WO2006107833A1 - Method and apparatus for vector quantizing of a spectral envelope representation - Google Patents
Method and apparatus for vector quantizing of a spectral envelope representation Download PDFInfo
- Publication number
- WO2006107833A1 WO2006107833A1 PCT/US2006/012227 US2006012227W WO2006107833A1 WO 2006107833 A1 WO2006107833 A1 WO 2006107833A1 US 2006012227 W US2006012227 W US 2006012227W WO 2006107833 A1 WO2006107833 A1 WO 2006107833A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- vector
- quantization error
- calculating
- frame
- quantized
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/02—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders
- G10L19/0204—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders using subband decomposition
- G10L19/0208—Subband vocoders
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/038—Speech enhancement, e.g. noise reduction or echo cancellation using band spreading techniques
- G10L21/0388—Details of processing therefor
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/02—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders
- G10L19/032—Quantisation or dequantisation of spectral components
- G10L19/038—Vector quantisation, e.g. TwinVQ audio
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
- G10L19/16—Vocoder architecture
- G10L19/18—Vocoders using multiple modes
- G10L19/24—Variable rate codecs, e.g. for generating different qualities using a scalable representation such as hierarchical encoding or layered encoding
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
- G10L21/0216—Noise filtering characterised by the method used for estimating noise
- G10L21/0232—Processing in the frequency domain
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/038—Speech enhancement, e.g. noise reduction or echo cancellation using band spreading techniques
Definitions
- This invention relates to signal processing.
- a speech encoder sends a characterization of the spectral envelope of a speech signal to a decoder in the form of a vector of line spectral frequencies (LSFs) or a similar representation. For efficient transmission, these LSFs are quantized.
- LSFs line spectral frequencies
- a quantizer is configured to quantize a smoothed value of an input value (such as a vector of line spectral frequencies or portion thereof) to produce a corresponding output value, where the smoothed value is based on a scale factor and a quantization error of a previous output value.
- FIGURE Ia shows a block diagram of a speech encoder ElOO according to an embodiment.
- FIGURE Ib shows a block diagram of a speech decoder E200.
- FIGURE 2 shows an example of a one-dimensional mapping typically performed by a scalar quantizer.
- FIGURE 3 shows one simple example of a multidimensional mapping as performed by a vector quantizer.
- FIGURE 4a shows one example of a one-dimensional signal
- FIGURE 4b shows an example of a version of this signal after quantization.
- FIGURE 4c shows an example of the signal of FIGURE 4a as quantized by a quantizer 230a as shown in FIGURE 5.
- FIGURE 4d shows an example of the signal of FIGURE 4a as quantized by a quantizer 230b as shown in FIGURE 6.
- FIGURE 5 shows a block diagram of an implementation 230a of a quantizer 230 according to an embodiment.
- FIGURE 6 shows a block diagram of an implementation 230b of a quantizer 230 according to an embodiment.
- FIGURE 7a shows an example of a plot of frequency vs. log amplitude for a speech signal.
- FIGURE 7b shows a block diagram of a basic linear prediction coding system.
- FIGURE 8 shows a block diagram of an implementation A122 of narrowband encoder Al 20.
- FIGURE 9 shows a block diagram of an implementation B 112 of narrowband encoder BIlO.
- FIGURE 10a is a block diagram of a wideband speech encoder AlOO.
- FIGURE 10b is a block diagram of an implementation A102 of wideband speech encoder AlOO.
- FIGURE 1 Ia is a block diagram of a wideband speech decoder BlOO corresponding to wideband speech encoder AlOO.
- FIGURE 1 Ib is an example of a wideband speech decoder B 102 corresponding to wideband speech encoder A102.
- Embodiments include system, methods, and apparatus configured to perform high-quality wideband speech coding using temporal noise shaping quantization of spectral envelope parameters.
- Features include fixed or adaptive smoothing of coefficient representations such as highband LSFs.
- Particular applications described herein include a wideband speech coder that combines a narrowband signal with a highband signal.
- the term “calculating” is used herein to indicate any of its ordinary meanings, such as computing, generating, and selecting from a list of values. Where the term “comprising” is used in the present description and claims, it does not exclude other elements or operations.
- the term “A is based on B” is used to indicate any of its ordinary meanings, including the cases (i) "A is equal to B” and (ii) "A is based on at least B.”
- Internet Protocol includes version 4, as described in EETF (Internet Engineering Task Force) RFC (Request for Comments) 791, and subsequent versions such as version 6.
- a speech encoder may be implemented according to a source-filter model that encodes the input speech signal as a set of parameters that describe a filter.
- a spectral envelope of a speech signal is characterized by a number of peaks that represent resonances of the vocal tract and are called formants.
- FIGURE 7a shows one example of such a spectral envelope.
- Most speech coders encode at least this coarse spectral structure as a set of parameters such as filter coefficients.
- FIGURE Ia shows a block diagram of a speech encoder ElOO according to an embodiment.
- the analysis module may be implemented as a linear prediction coding (LPC) analysis module 210 that encodes the spectral envelope of the speech signal Sl as a set of linear prediction (LP) coefficients (e.g., coefficients of an all-pole filter 1/A(z)).
- LPC linear prediction coding
- the analysis module typically processes the input signal as a series of nonoverlapping frames, with a new set of coefficients being calculated for each frame.
- the frame period is generally a period over which the signal may be expected to be locally stationary; one common example is 20 milliseconds (equivalent to 160 samples at a sampling rate of 8 kHz).
- One example of a lowband LPC analysis module is configured to calculate a set of ten LP filter coefficients to characterize the formant structure of each 20-millisecond frame of lowband speech signal S20
- one example of a highband LPC analysis module is configured to calculate a set of six (alternatively, eight) LP filter coefficients to characterize the formant structure of each 20-millisecond frame of highband speech signal S30. It is also possible to implement the analysis module to process the input signal as a series of overlapping frames.
- the analysis module may be configured to analyze the samples of each frame directly, or the samples may be weighted first according to a windowing function (for example, a Hamming window). The analysis may also be performed over a window that is larger than the frame, such as a 30-msec window. This window may be symmetric (e.g. 5-20-5, such that it includes the 5 milliseconds immediately before and after the 20-millisecond frame) or asymmetric (e.g. 10-20, such that it includes the last 10 milliseconds of the preceding frame).
- An LPC analysis module is typically configured to calculate the LP filter coefficients using a Levinson-Durbin recursion or . the Leroux-Gueguen algorithm.
- the analysis module may be configured to calculate a set of cepstral coefficients for each frame instead of a set of LP filter coefficients.
- Speech encoder ElOO as shown in FIGURE Ia includes a LP filter coefficient-to-LSF transform 220 configured to transform the set of LP filter coefficients into a corresponding vector of LSFs.
- LP filter coefficients include parcor coefficients; log-area-ratio values; immittance spectral pairs (ISPs); and immittance spectral frequencies (ISFs), which are used in the GSM (Global System for Mobile Communications) AMR-WB (Adaptive Multirate- Wideband) codec.
- ISPs immittance spectral pairs
- ISFs immittance spectral frequencies
- GSM Global System for Mobile Communications
- AMR-WB Adaptive Multirate- Wideband
- a speech encoder typically includes a quantizer configured to quantize the set of narrowband LSFs (or other coefficient representation) and to output the result of this quantization as the filter parameters. Quantization is typically performed using a vector quantizer that encodes the input vector as an index to a corresponding vector entry in a table or codebook. Such a quantizer may also be configured to perform classified vector quantization. For example, such a quantizer may be configured to select one of a set of codebooks based on information that has already been coded within the same frame (e.g., in the lowband channel and/or in the highband channel). Such a technique typically provides increased coding efficiency at the expense of additional codebook storage.
- FIGURE Ib shows a block diagram of a corresponding speech decoder E200 that includes an inverse quantizer 310 configured to dequantize the quantized LSFs S3, and a LSF-to-LP filter coefficient transform 320 configured to transform the dequantized LSF vector into a set of LP filter coefficients.
- a synthesis filter 330 configured according to the LP filter coefficients is typically driven by an excitation signal to produce a synthesized reproduction S5 of the input speech signal.
- the excitation signal may be based on a random noise signal and/or on a quantized representation of the residual as sent by the encoder.
- the excitation signal for one band is derived from the excitation signal for another band.
- Quantization of the LSFs introduces a random error that is usually uncorrelated from one frame to the next. This error may cause the quantized LSFs to be less smooth than the unquantized LSFs and may reduce the perceptual quality of the decoded signal. Independent quantization of LSF vectors generally increases the amount of spectral fluctuation from frame to frame compared to the unquantized LSF vectors, and these spectral fluctuations may cause the decoded signal to sound unnatural. [00031]
- One complicated solution was proposed by Knagenhjelm and Kleijn, in which a smoothing of the dequantized LSF parameters is performed in the decoder. This reduces the spectral fluctuations, but comes at the cost of additional delay. This application describes method that use temporal noise shaping on the encoder side, such that spectral fluctuations may be reduced without additional delay.
- a quantizer is typically configured to map an input value to one of a set of discrete output values.
- a limited number of output values are available, such that a range of input values is mapped to a single output value.
- Quantization increases coding efficiency because an index that indicates the corresponding output value may be transmitted in fewer bits than the original input value.
- FIGURE 2 shows an example of a one-dimensional mapping typically performed by a scalar quantizer.
- FIGURE 3 shows one simple example of a multidimensional mapping as performed by a vector quantizer.
- the input space is divided into a number of Voronoi regions (e.g., according to a nearest- neighbor criterion).
- the quantization maps each input value to a value that represents the corresponding Voronoi region (typically, the centroid), shown here as a point.
- the input space is divided into six regions, such that any input value may be represented by an index having only six different states.
- FIGURE 4a shows one example of a smooth one- dimensional signal that varies only within one quantization level (only one such level is shown here), and FIGURE 4b shows an example of this signal after quantization. Even though the input in FIGURE 4a varies over only a small range, the resulting output in FIGURE 4b contains more abrupt transitions and is much less smooth. Such an effect may lead to audible artifacts, and it may be desirable to reduce this effect for LSFs (or other representation of the spectral envelope to be quantized). For example, LSF quantization performance may be improved by incorporating temporal noise shaping.
- a vector of spectral envelope parameters is estimated once for every frame (or other block) of speech in the encoder.
- the parameter vector is quantized for efficient transmission to the decoder.
- the quantization error (defined as the difference between quantized and unquantized parameter vector) is stored.
- the quantization error of frame N-I is reduced by a scale factor and added to the parameter vector of frame N, before quantizing the parameter vector of frame N. It may be desirable for the value of the scale factor to be smaller when the difference between current and previous estimated spectral envelopes is relatively large.
- the LSF quantization error vector is computed for each frame and multiplied by a scale factor b having a value less than 1.0.
- the scaled quantization error for the previous frame is added to the LSF vector (input value VlO).
- a quantization operation of such a method may be described by an expression such as the following:
- y(n) Q(s( ⁇ ) + b[y(n-i) ⁇ s(n - 1)]) ,
- s(n) is the smoothed LSF vector pertaining to frame n
- y( ⁇ ) is the quantized LSF vector pertaining to frame n
- Q(-) is a nearest-neighbor quantization operation
- b is the scale factor
- a quantizer 230 is configured to produce a quantized output value V30 of a smoothed value V20 of an input value VlO (e.g., an LSF vector), where the smoothed value V20 is based on a scale factor b V40 and a quantization error of a previous output value V30a.
- VlO e.g., an LSF vector
- FIGURE 5 shows a block diagram of one implementation 230a of quantizer 230, in which values that may be particular to this implementation are indicated by the index a.
- a quantization error is computed by subtracting the current value of smoothed value V20a from the current output value V30a as dequantized by inverse quantizer Q20.
- FIGURE 4c shows an example of a (dequantized) sequence of output values V30a as produced by quantizer 230a in response to the input signal of FIGURE 4a.
- the value of b is fixed at 0.5. It may be seen that the signal of FIGURE 4c is smoother than the fluctuating signal of FIGURE 4a.
- the quantization error may be calculated with respect to the current input value rather than with respect to the current smoothed value.
- Such a method may be described by an expression such as the following:
- x( ⁇ ) is the input LSF vector pertaining to frame n.
- FIGURE 6 shows a block diagram of an implementation 230b of quantizer 230, in which values that may be particular to this implementation are indicated by the index b.
- a quantization error is computed by subtracting the current input value VlO from the current output value V30b as dequantized by inverse quantizer Q20. The error is stored to delay element DElO.
- Smoothed value V20b is a sum of the current input value VlO and the quantization error of the previous frame as scaled (e.g. multiplied) by scale factor V40.
- Quantizer 230b may also be implemented such that the scale factor V40 is applied before storage of the quantization error to delay element DElO instead. It is also possible to use different values of scale factor V40 in implementation 230a as opposed to implementation 230b.
- FIGURE 4d shows an example of a (dequantized) sequence of output values V30b as produced by quantizer 230b in response to the input signal of FIGURE 4a.
- the value of b is fixed at 0.5. It may be seen that the signal of FIGURE 4d is smoother than the fluctuating signal of FIGURE 4a.
- quantizer QlO may be implemented as a predictive vector quantizer, a multi-stage quantizer, a split vector quantizer, or according to any other scheme for LSF quantization.
- the value of b is fixed at a desired value between 0 and 1.
- the scale factor When the difference between the current and previous LSF vectors is large, the scale factor is close to zero and almost no noise shaping results. When the current LSF vector differs little from the previous one, the scale factor is close to 1.0. In such manner, transitions in the spectral envelope over time may be retained, minimizing spectral distortion when the speech signal is changing, while spectral fluctuations may be reduced when the speech signal is relatively constant from one frame to the next.
- the value of b may be made proportional to the distance between consecutive LSFs, and any of various distances between vectors may be used to determine the change between LSFs.
- the Euclidean norm is typically used, but others which may be used include Manhattan distance (1-norm), Chebyshev distance (infinity norm), Mahalanobis distance, Hamming distance.
- the distance d may be calculated according to an expression such as the following:
- c indicates a vector of weighting factors.
- the values of c may be selected to emphasize lower frequency components that are more perceptually significant.
- the distance d between consecutive LSF vectors may be calculated according to an expression such as the following:
- Wi has the value P(f ⁇ ) r , where P denotes the LPC power spectrum evaluated at the corresponding frequency/, and r is a constant having a typical value of, e.g., 0.15 or 0.3.
- the values of w are selected according to a corresponding weight function used in the ITU-T G.729 standard:
- c,- may have values as indicated above.
- Q has the value 1.0, except for C 4 and C 5 which have the value 1.2.
- a temporal noise shaping method as described herein may increase the quantization error.
- the absolute squared error of the quantization operation may increase, however, a potential advantage is that the quantization error may be moved to a different part of the spectrum. For example, the quantization error may be moved to lower frequencies, thus becoming more smooth.
- a smoother output signal may be obtained as a sum of the input signal and the smoothed quantization error.
- FIGURE 7b shows an example of a basic source-filter arrangement as applied to coding of the spectral envelope of a narrowband signal S20.
- An analysis module calculates a set of parameters that characterize a filter corresponding to the speech sound over a period of time (typically 20 msec).
- a whitening filter also called an analysis or prediction error filter
- the resulting whitened signal also called a residual
- the filter parameters and residual are typically quantized for efficient transmission over the channel.
- FIGURE 8 shows a block diagram of a basic implementation A122 of narrowband encoder A120.
- narrowband encoder A122 also generates a residual signal by passing narrowband signal S20 through a whitening filter 260 (also called an analysis or prediction error filter) that is configured according to the set of filter coefficients.
- whitening filter 260 is implemented as a FER filter, although IIR implementations may also be used.
- This residual signal will typically contain perceptually important information of the speech frame, such as long- term structure relating to pitch, that is not represented in narrowband filter parameters S40.
- Quantizer 270 is configured to calculate a quantized representation of this residual signal for output as encoded narrowband excitation signal S50.
- Such a quantizer typically includes a vector quantizer that encodes the input vector as an index to a corresponding vector entry in a table or codebook.
- a quantizer may be configured to send one or more parameters from which the vector may be generated dynamically at the decoder, rather than retrieved from storage, as in a sparse codebook method.
- Such a method is used in coding schemes such as algebraic CELP (codebook excitation linear prediction) and codecs such as 3GPP2 (Third Generation Partnership 2) EVRC (Enhanced Variable Rate Codec).
- narrowband encoder A120 It is desirable for narrowband encoder A120 to generate the encoded narrowband excitation signal according to the same filter parameter values that will be available to the corresponding narrowband decoder. In this manner, the resulting encoded narrowband excitation signal may already account to some extent for nonidealities in those parameter values, such as quantization error. Accordingly, it is desirable to configure the whitening filter using the same coefficient values that will be available at the decoder.
- inverse quantizer 240 dequantizes narrowband filter parameters S40, LSF-to-LP filter coefficient transform 250 maps the resulting values back to a corresponding set of LP filter coefficients, and this set of coefficients is used to configure whitening filter 260 to generate the residual signal that is quantized by quantizer 270.
- narrowband encoder A120 are configured to calculate encoded narrowband excitation signal S50 by identifying one among a set of codebook vectors that best matches the residual signal. It is noted, however, that narrowband encoder A 120 may also be implemented to calculate a quantized representation of the residual signal without actually generating the residual signal. For example, narrowband encoder A120 may be configured to use a number of codebook vectors to generate corresponding synthesized signals (e.g., according to a current set of filter parameters), and to select the codebook vector associated with the generated signal that best matches the original narrowband signal S20 in a perceptually weighted domain.
- FIGURE 9 shows a block diagram of an implementation Bl 12 of narrowband decoder BIlO.
- Inverse quantizer 310 dequantizes narrowband filter parameters S40 (in this case, to a set of LSFs), and LSF-to-LP filter coefficient transform 320 transforms the LSFs into a set of filter coefficients (for example, as described above with reference to inverse quantizer 240 and transform 250 of narrowband encoder A 122).
- Inverse quantizer 340 dequantizes narrowband residual signal S40 to produce a narrowband excitation signal S80.
- narrowband synthesis filter 330 synthesizes narrowband signal S90.
- narrowband synthesis filter 330 is configured to spectrally shape narrowband excitation signal S80 according to the dequantized filter coefficients to produce narrowband signal S90.
- Narrowband decoder B 112 also provides narrowband excitation signal S 80 to highband encoder A200, which uses it to derive the highband excitation signal S 120 as described herein.
- narrowband decoder BIlO may be configured to provide additional information to highband decoder B200 that relates to the narrowband signal, such as spectral tilt, pitch gain and lag, and speech mode.
- the system of narrowband encoder A122 and narrowband decoder Bl 12 is a basic example of an analysis-by-synthesis speech codec.
- PSTN public switched telephone network
- VoIP voice over IP
- VoIP may not have the same bandwidth limits, and it may be desirable to transmit and receive voice communications that include a wideband frequency range over such networks. For example, it may be desirable to support an audio frequency range that extends down to 50 Hz and/or up to 7 or 8 kHz. It may also be desirable to support other applications, such as high-quality audio or audio/video conferencing, that may have audio speech content in ranges outside the traditional PSTN limits.
- One approach to wideband speech coding involves scaling a narrowband speech coding technique (e.g., one configured to encode the range of 0-4 kHz) to cover the wideband spectrum.
- a speech signal may be sampled at a higher rate to include components at high frequencies, and a narrowband coding technique may be reconfigured to use more filter coefficients to represent this wideband signal.
- Narrowband coding techniques such as CELP (codebook excited linear prediction) are computationally intensive, however, and a wideband CELP coder may consume too many processing cycles to be practical for many mobile and other embedded applications. Encoding the entire spectrum of a wideband signal to a desired quality using such a technique may also lead to an unacceptably large increase in bandwidth.
- transcoding of such an encoded signal would be required before even its narrowband portion could be transmitted into and/or decoded by a system that only supports narrowband coding.
- FIGURE 10a shows a block diagram of a wideband speech encoder AlOO that includes separate narrowband and highband speech encoders A120 and A200, respectively. Either or both of narrowband and highband speech encoders A120 and A200 may be configured to perform quantization of LSFs (or another coefficient representation) using an implementation of quantizer 230 as disclosed herein.
- FIGURE 11a shows a block diagram of a corresponding wideband speech decoder BlOO.
- Filter banks AIlO and B 120 may be implemented to produce narrowband signal S20 and highband signal S30 from a wideband speech signal SlO according to the principles and implementations disclosed in the Patent Application "SYSTEMS, METHODS, AND APPARATUS FOR SPEECH SIGNAL FILTERING" filed herewith, Attorney Docket No. 050551, and this disclosure of such filter banks therein is hereby incorporated by reference.
- wideband speech coding such that at least the narrowband portion of the encoded signal may be sent through a narrowband channel (such as a PSTN channel) without transcoding or other significant modification.
- Efficiency of the wideband coding extension may also be desirable, for example, to avoid a significant reduction in the number of users that may be serviced in applications such as wireless cellular telephony and broadcasting over wired and wireless channels.
- One approach to wideband speech coding involves extrapolating the highband spectral envelope from the encoded narrowband spectral envelope. While such an approach may be implemented without any increase in bandwidth and without a need for transcoding, however, the coarse spectral envelope or formant structure of the highband portion of a speech signal generally cannot be predicted accurately from the spectral envelope of the narrowband portion.
- wideband speech encoder AlOO is configured to encode wideband speech signal SlO at a rate of about 8.55 kbps (kilobits per second), with about 7.55 kbps being used for narrowband filter parameters S40 and encoded narrowband excitation signal S50, and about 1 kbps being used for highband coding parameters (e.g., filter parameters and/or gain parameters) S60.
- highband coding parameters e.g., filter parameters and/or gain parameters
- FIGURE 10b shows a block diagram of wideband speech encoder A102 that includes a multiplexer A130 configured to combine narrowband filter parameters S40, an encoded narrowband excitation signal S50, and highband coding parameters S60 into a multiplexed signal S70.
- FIGURE lib shows a block diagram of a corresponding implementation B 102 of wideband speech decoder BlOO.
- multiplexer A 130 may be configured to embed the encoded lowband signal (including lowband filter parameters S40 and encoded lowband excitation signal S50) as a separable substream of multiplexed signal S70, such that the encoded lowband signal may be recovered and decoded independently of another portion of multiplexed signal S70 such as a highband and/or very-low-band signal.
- multiplexed signal S70 may be arranged such that the encoded lowband signal may be recovered by stripping away the highband coding parameters S60.
- One potential advantage of such a feature is to avoid the need for transcoding the encoded wideband signal before passing it to a system that supports decoding of the lowband signal but does not support decoding of the highband portion.
- An apparatus including a noise-shaping quantizer and/or a lowband, highband, and/or wideband speech encoder as described herein may also include circuitry configured to transmit the encoded signal into a transmission channel such as a wired, optical, or wireless channel.
- a transmission channel such as a wired, optical, or wireless channel.
- Such an apparatus may also be configured to perform one or more channel encoding operations on the signal, such as error correction encoding (e.g., rate-compatible convolutional encoding) and/or error detection encoding (e.g., cyclic redundancy encoding), and/or one or more layers of network protocol encoding (e.g., Ethernet, TCP/IP, cdma2000).
- error correction encoding e.g., rate-compatible convolutional encoding
- error detection encoding e.g., cyclic redundancy encoding
- network protocol encoding e.g., Ethernet, TCP/IP, cd
- Codebook excitation linear prediction (CELP) coding is one popular family of analysis-by-synthesis coding, and implementations of such coders may perform waveform encoding of the residual, including such operations as selection of entries from fixed and adaptive codebooks, error minimization operations, and/or perceptual weighting operations.
- Other implementations of analysis- by-synthesis coding include mixed excitation linear prediction (MELP), algebraic CELP (ACELP), relaxation CELP (RCELP), regular pulse excitation (RPE), multi-pulse CELP (MPE), and vector-sum excited linear prediction (VSELP) coding.
- MELP mixed excitation linear prediction
- ACELP algebraic CELP
- RPE regular pulse excitation
- MPE multi-pulse CELP
- VSELP vector-sum excited linear prediction
- MBE multi-band excitation
- PWI prototype waveform interpolation
- ETSI European Telecommunications Standards Institute
- GSM 06.10 GSM full rate codec
- RELP residual excited linear prediction
- GSM enhanced full rate codec ETSI-GSM 06.60
- ITU International Telecommunication Union
- IS-641 IS- 136
- GSM-AMR GSM adaptive multirate
- 4GVTM Full-Generation VocoderTM codec
- RCELP coders include the Enhanced Variable Rate Codec (EVRC), as described in Telecommunications Industry Association (TIA) IS-127, and the Third Generation Partnership Project 2 (3GPP2) Selectable Mode Vocoder (SMV).
- EVRC Enhanced Variable Rate Codec
- TIA Telecommunications Industry Association
- 3GPP2 Third Generation Partnership Project 2
- SMV Selectable Mode Vocoder
- the various lowband, highband, and wideband encoders described herein may be implemented according to any of these technologies, or any other speech coding technology (whether known or to be developed) that represents a speech signal as (A) a set of parameters that describe a filter and (B) a quantized representation of a residual signal that provides at least part of an excitation used to drive the described filter to reproduce the speech signal.
- embodiments as described herein include implementations that may be used to perform embedded coding, supporting compatibility with narrowband systems and avoiding a need for transcoding.
- Support for highband coding may also serve to differentiate on a cost basis between chips, chipsets, devices, and/or networks having wideband support with backward compatibility, and those having narrowband support only.
- Support for highband coding as described herein may also be used in conjunction with a technique for supporting lowband coding, and a system, method, or apparatus according to such an embodiment may support coding of frequency components from, for example, about 50 or 100 Hz up to about 7 or 8 kHz.
- highband support may improve intelligibility, especially regarding differentiation of fricatives. Although such differentiation may usually be derived by a human listener from the particular context, highband support may serve as an enabling feature in speech recognition and other machine interpretation applications, such as systems for automated voice menu navigation and/or automatic call processing.
- An apparatus may be embedded into a portable device for wireless communications, such as a cellular telephone or personal digital assistant (PDA).
- a portable device for wireless communications such as a cellular telephone or personal digital assistant (PDA).
- PDA personal digital assistant
- such an apparatus may be included in another communications device such as a VoIP handset, a personal computer configured to support VoIP communications, or a network device configured to route telephonic or VoIP communications.
- an apparatus according to an embodiment may be implemented in a chip or chipset for a communications device.
- such a device may also include such features as analog-to-digital and/or digital-to-analog conversion of a speech signal, circuitry for performing amplification and/or other signal processing operations on a speech signal, and/or radio- frequency circuitry for transmission and/or reception of the coded speech signal.
- embodiments may include and/or be used with any one or more of the other features disclosed in the U.S. Provisional Pat. Appls. Nos. 60/667,901 and 60/673,965 of which this application claims benefit and/or the related applications filed herewith and listed above.
- Such features include shifting of highband signal S30 and/or highband excitation signal S 120 according to a regularization or other shift of narrowband excitation signal S 80 or narrowband residual signal S50.
- Such features include adaptive smoothing of LSFs, which may be performed prior to a quantization as described herein.
- Such features also include fixed or adaptive smoothing of a gain envelope, and adaptive attenuation of a gain envelope.
- an embodiment may be implemented in part or in whole as a hard-wired circuit, as a circuit configuration fabricated into an application-specific integrated circuit, or as a firmware program loaded into non-volatile storage or a software program loaded from or into a data storage medium as machine-readable code, such code being instructions executable by an array of logic elements such as a microprocessor or other digital signal processing unit.
- the data storage medium may be an array of storage elements such as semiconductor memory (which may include without limitation dynamic or static RAM (random-access memory), ROM (read-only memory), and/or flash RAM), or ferroelectric, magnetoresistive, ovonic, polymeric, or phase-change memory; or a disk medium such as a magnetic or optical disk.
- semiconductor memory which may include without limitation dynamic or static RAM (random-access memory), ROM (read-only memory), and/or flash RAM), or ferroelectric, magnetoresistive, ovonic, polymeric, or phase-change memory
- a disk medium such as a magnetic or optical disk.
- the term "software” should be understood to include source code, assembly language code, machine code, binary code, firmware, macrocode, microcode, any one or more sets or sequences of instructions executable by an array of logic elements, and any combination of such examples.
- noise-shaping quantizer may be implemented as electronic and/or optical devices residing, for example, on the same chip or among two or more chips in a chipset, although other arrangements without such limitation are also contemplated.
- One or more elements of such an apparatus may be implemented in whole or in part as one or more sets of instructions arranged to execute on one or more fixed or programmable arrays of logic elements (e.g., transistors, gates) such as microprocessors, embedded processors, IP cores, digital signal processors, FPGAs (field-programmable gate arrays), ASSPs (application-specific standard products), and ASICs (application-specific integrated circuits). It is also possible for one or more such elements to have structure in common (e.g., a processor used to execute portions of code corresponding to different elements at different times, a set of instructions executed to perform tasks corresponding to different elements at different times, or an arrangement of electronic and/or optical devices performing operations for different elements at different times). Moreover, it is possible for one or more such elements to be used to perform tasks or execute other sets of instructions that are not directly related to an operation of the apparatus, such as a task relating to another operation of a device or system in which the apparatus is embedded.
- logic elements e.g., transistors,
- Embodiments also include additional methods of speech processing, speech encoding, and highband burst suppression as are expressly disclosed herein, e.g., by descriptions of structural embodiments configured to perform such methods.
- Each of these methods may also be tangibly embodied (for example, in one or more data storage media as listed above) as one or more sets of instructions readable and/or executable by a machine including an array of logic elements (e.g., a processor, microprocessor, microcontroller, or other finite state machine).
- logic elements e.g., a processor, microprocessor, microcontroller, or other finite state machine.
Abstract
Description
Claims
Priority Applications (12)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008504474A JP5203929B2 (en) | 2005-04-01 | 2006-04-03 | Vector quantization method and apparatus for spectral envelope display |
BRPI0608269A BRPI0608269B8 (en) | 2005-04-01 | 2006-04-03 | Method and apparatus for vector quantization of a spectral envelope representation |
CN2006800181405A CN101180676B (en) | 2005-04-01 | 2006-04-03 | Methods and apparatus for quantization of spectral envelope representation |
DE602006017673T DE602006017673D1 (en) | 2005-04-01 | 2006-04-03 | METHOD AND DEVICE FOR VECTOR-QUANTIZING A SPEKTRALENVELOP REPRESENTATION |
AU2006232357A AU2006232357C1 (en) | 2005-04-01 | 2006-04-03 | Method and apparatus for vector quantizing of a spectral envelope representation |
MX2007012185A MX2007012185A (en) | 2005-04-01 | 2006-04-03 | Method and apparatus for vector quantizing of a spectral envelope representation. |
AT06740351T ATE485582T1 (en) | 2005-04-01 | 2006-04-03 | METHOD AND DEVICE FOR VECTOR QUANTIZATION OF A SPECTRAL VELOP REPRESENTATION |
EP06740351A EP1869670B1 (en) | 2005-04-01 | 2006-04-03 | Method and apparatus for vector quantizing of a spectral envelope representation |
NZ562185A NZ562185A (en) | 2005-04-01 | 2006-04-03 | Method and apparatus for vector quantizing of a spectral envelope representation |
CA2603219A CA2603219C (en) | 2005-04-01 | 2006-04-03 | Method and apparatus for vector quantizing of a spectral envelope representation |
IL186438A IL186438A (en) | 2005-04-01 | 2007-10-07 | Method and apparatus for vector quantizing of a spectral envelope representation |
NO20075509A NO20075509L (en) | 2005-04-22 | 2007-10-31 | Vector quantization of a spectral envelope preparation |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US66790105P | 2005-04-01 | 2005-04-01 | |
US60/667,901 | 2005-04-01 | ||
US67396505P | 2005-04-22 | 2005-04-22 | |
US60/673,965 | 2005-04-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006107833A1 true WO2006107833A1 (en) | 2006-10-12 |
Family
ID=36588741
Family Applications (8)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2006/012234 WO2006130221A1 (en) | 2005-04-01 | 2006-04-03 | Systems, methods, and apparatus for highband excitation generation |
PCT/US2006/012235 WO2006107840A1 (en) | 2005-04-01 | 2006-04-03 | Systems, methods, and apparatus for wideband speech coding |
PCT/US2006/012228 WO2006107834A1 (en) | 2005-04-01 | 2006-04-03 | Systems, methods, and apparatus for highband burst suppression |
PCT/US2006/012227 WO2006107833A1 (en) | 2005-04-01 | 2006-04-03 | Method and apparatus for vector quantizing of a spectral envelope representation |
PCT/US2006/012233 WO2006107839A2 (en) | 2005-04-01 | 2006-04-03 | Method and apparatus for anti-sparseness filtering of a bandwidth extended speech prediction excitation signal |
PCT/US2006/012232 WO2006107838A1 (en) | 2005-04-01 | 2006-04-03 | Systems, methods, and apparatus for highband time warping |
PCT/US2006/012230 WO2006107836A1 (en) | 2005-04-01 | 2006-04-03 | Method and apparatus for split-band encoding of speech signals |
PCT/US2006/012231 WO2006107837A1 (en) | 2005-04-01 | 2006-04-03 | Methods and apparatus for encoding and decoding an highband portion of a speech signal |
Family Applications Before (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2006/012234 WO2006130221A1 (en) | 2005-04-01 | 2006-04-03 | Systems, methods, and apparatus for highband excitation generation |
PCT/US2006/012235 WO2006107840A1 (en) | 2005-04-01 | 2006-04-03 | Systems, methods, and apparatus for wideband speech coding |
PCT/US2006/012228 WO2006107834A1 (en) | 2005-04-01 | 2006-04-03 | Systems, methods, and apparatus for highband burst suppression |
Family Applications After (4)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2006/012233 WO2006107839A2 (en) | 2005-04-01 | 2006-04-03 | Method and apparatus for anti-sparseness filtering of a bandwidth extended speech prediction excitation signal |
PCT/US2006/012232 WO2006107838A1 (en) | 2005-04-01 | 2006-04-03 | Systems, methods, and apparatus for highband time warping |
PCT/US2006/012230 WO2006107836A1 (en) | 2005-04-01 | 2006-04-03 | Method and apparatus for split-band encoding of speech signals |
PCT/US2006/012231 WO2006107837A1 (en) | 2005-04-01 | 2006-04-03 | Methods and apparatus for encoding and decoding an highband portion of a speech signal |
Country Status (24)
Country | Link |
---|---|
US (8) | US8260611B2 (en) |
EP (8) | EP1864283B1 (en) |
JP (8) | JP4955649B2 (en) |
KR (8) | KR101019940B1 (en) |
CN (1) | CN102411935B (en) |
AT (4) | ATE459958T1 (en) |
AU (8) | AU2006232358B2 (en) |
BR (8) | BRPI0607690A8 (en) |
CA (8) | CA2602804C (en) |
DE (4) | DE602006018884D1 (en) |
DK (2) | DK1864101T3 (en) |
ES (3) | ES2391292T3 (en) |
HK (5) | HK1113848A1 (en) |
IL (8) | IL186439A0 (en) |
MX (8) | MX2007012189A (en) |
NO (7) | NO20075503L (en) |
NZ (6) | NZ562182A (en) |
PL (4) | PL1864282T3 (en) |
PT (2) | PT1864282T (en) |
RU (9) | RU2376657C2 (en) |
SG (4) | SG163555A1 (en) |
SI (1) | SI1864282T1 (en) |
TW (8) | TWI330828B (en) |
WO (8) | WO2006130221A1 (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009530675A (en) * | 2006-10-25 | 2009-08-27 | フラウンホーファー−ゲゼルシャフト・ツール・フェルデルング・デル・アンゲヴァンテン・フォルシュング・アインゲトラーゲネル・フェライン | Apparatus and method for generating audio subband values, and apparatus and method for generating time domain audio samples |
JP2010500631A (en) * | 2006-08-15 | 2010-01-07 | ドルビー・ラボラトリーズ・ライセンシング・コーポレーション | Free shaping of temporal noise envelope without side information |
WO2012001187A1 (en) * | 2010-06-29 | 2012-01-05 | Universidad De Malaga | Low-consumption sound recognition system |
US8699727B2 (en) | 2010-01-15 | 2014-04-15 | Apple Inc. | Visually-assisted mixing of audio using a spectral analyzer |
RU2546602C2 (en) * | 2010-04-13 | 2015-04-10 | Фраунхофер-Гезелльшафт Цур Фердерунг Дер Ангевандтен Форшунг Е.Ф. | Method and encoder and decoder for reproduction without audio signal interval |
CN105264599A (en) * | 2013-01-29 | 2016-01-20 | 弗劳恩霍夫应用研究促进协会 | Audio encoder, audio decoder, method for providing encoded audio information and decoded audio information, computer program and encoded representation using a signal-adaptive bandwidth extension |
EP2983170A4 (en) * | 2013-07-04 | 2016-04-13 | Huawei Tech Co Ltd | Frequency domain envelope vector quantization method and apparatus |
US9460729B2 (en) | 2012-09-21 | 2016-10-04 | Dolby Laboratories Licensing Corporation | Layered approach to spatial audio coding |
US10096322B2 (en) | 2013-06-21 | 2018-10-09 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. | Audio decoder having a bandwidth extension module with an energy adjusting module |
US10354663B2 (en) | 2014-07-28 | 2019-07-16 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Apparatus and method for generating an enhanced signal using independent noise-filling |
Families Citing this family (312)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7987095B2 (en) * | 2002-09-27 | 2011-07-26 | Broadcom Corporation | Method and system for dual mode subband acoustic echo canceller with integrated noise suppression |
US7619995B1 (en) * | 2003-07-18 | 2009-11-17 | Nortel Networks Limited | Transcoders and mixers for voice-over-IP conferencing |
JP4679049B2 (en) * | 2003-09-30 | 2011-04-27 | パナソニック株式会社 | Scalable decoding device |
US7668712B2 (en) * | 2004-03-31 | 2010-02-23 | Microsoft Corporation | Audio encoding and decoding with intra frames and adaptive forward error correction |
EP3336843B1 (en) * | 2004-05-14 | 2021-06-23 | Panasonic Intellectual Property Corporation of America | Speech coding method and speech coding apparatus |
EP1775717B1 (en) * | 2004-07-20 | 2013-09-11 | Panasonic Corporation | Speech decoding apparatus and compensation frame generation method |
CA2691959C (en) * | 2004-08-30 | 2013-07-30 | Qualcomm Incorporated | Method and apparatus for an adaptive de-jitter buffer |
US8085678B2 (en) * | 2004-10-13 | 2011-12-27 | Qualcomm Incorporated | Media (voice) playback (de-jitter) buffer adjustments based on air interface |
US8155965B2 (en) * | 2005-03-11 | 2012-04-10 | Qualcomm Incorporated | Time warping frames inside the vocoder by modifying the residual |
US8355907B2 (en) * | 2005-03-11 | 2013-01-15 | Qualcomm Incorporated | Method and apparatus for phase matching frames in vocoders |
US20090319277A1 (en) * | 2005-03-30 | 2009-12-24 | Nokia Corporation | Source Coding and/or Decoding |
RU2376657C2 (en) * | 2005-04-01 | 2009-12-20 | Квэлкомм Инкорпорейтед | Systems, methods and apparatus for highband time warping |
TWI317933B (en) * | 2005-04-22 | 2009-12-01 | Qualcomm Inc | Methods, data storage medium,apparatus of signal processing,and cellular telephone including the same |
CA2574468C (en) * | 2005-04-28 | 2014-01-14 | Siemens Aktiengesellschaft | Noise suppression process and device |
US7707034B2 (en) * | 2005-05-31 | 2010-04-27 | Microsoft Corporation | Audio codec post-filter |
US7831421B2 (en) * | 2005-05-31 | 2010-11-09 | Microsoft Corporation | Robust decoder |
US7177804B2 (en) * | 2005-05-31 | 2007-02-13 | Microsoft Corporation | Sub-band voice codec with multi-stage codebooks and redundant coding |
DE102005032724B4 (en) * | 2005-07-13 | 2009-10-08 | Siemens Ag | Method and device for artificially expanding the bandwidth of speech signals |
RU2008105555A (en) * | 2005-07-14 | 2009-08-20 | Конинклейке Филипс Электроникс Н.В. (Nl) | AUDIO SYNTHESIS |
US8169890B2 (en) * | 2005-07-20 | 2012-05-01 | Qualcomm Incorporated | Systems and method for high data rate ultra wideband communication |
KR101171098B1 (en) * | 2005-07-22 | 2012-08-20 | 삼성전자주식회사 | Scalable speech coding/decoding methods and apparatus using mixed structure |
US8326614B2 (en) * | 2005-09-02 | 2012-12-04 | Qnx Software Systems Limited | Speech enhancement system |
US7734462B2 (en) * | 2005-09-02 | 2010-06-08 | Nortel Networks Limited | Method and apparatus for extending the bandwidth of a speech signal |
WO2007037361A1 (en) * | 2005-09-30 | 2007-04-05 | Matsushita Electric Industrial Co., Ltd. | Audio encoding device and audio encoding method |
CN102623014A (en) * | 2005-10-14 | 2012-08-01 | 松下电器产业株式会社 | Transform coder and transform coding method |
JPWO2007043643A1 (en) * | 2005-10-14 | 2009-04-16 | パナソニック株式会社 | Speech coding apparatus, speech decoding apparatus, speech coding method, and speech decoding method |
JP4876574B2 (en) * | 2005-12-26 | 2012-02-15 | ソニー株式会社 | Signal encoding apparatus and method, signal decoding apparatus and method, program, and recording medium |
EP1852848A1 (en) * | 2006-05-05 | 2007-11-07 | Deutsche Thomson-Brandt GmbH | Method and apparatus for lossless encoding of a source signal using a lossy encoded data stream and a lossless extension data stream |
US8949120B1 (en) | 2006-05-25 | 2015-02-03 | Audience, Inc. | Adaptive noise cancelation |
US8260609B2 (en) * | 2006-07-31 | 2012-09-04 | Qualcomm Incorporated | Systems, methods, and apparatus for wideband encoding and decoding of inactive frames |
US8135047B2 (en) | 2006-07-31 | 2012-03-13 | Qualcomm Incorporated | Systems and methods for including an identifier with a packet associated with a speech signal |
US8725499B2 (en) * | 2006-07-31 | 2014-05-13 | Qualcomm Incorporated | Systems, methods, and apparatus for signal change detection |
US7987089B2 (en) * | 2006-07-31 | 2011-07-26 | Qualcomm Incorporated | Systems and methods for modifying a zero pad region of a windowed frame of an audio signal |
US8532984B2 (en) | 2006-07-31 | 2013-09-10 | Qualcomm Incorporated | Systems, methods, and apparatus for wideband encoding and decoding of active frames |
KR101008508B1 (en) * | 2006-08-15 | 2011-01-17 | 브로드콤 코포레이션 | Re-phasing of decoder states after packet loss |
US8239190B2 (en) * | 2006-08-22 | 2012-08-07 | Qualcomm Incorporated | Time-warping frames of wideband vocoder |
US8046218B2 (en) * | 2006-09-19 | 2011-10-25 | The Board Of Trustees Of The University Of Illinois | Speech and method for identifying perceptual features |
JP4972742B2 (en) * | 2006-10-17 | 2012-07-11 | 国立大学法人九州工業大学 | High-frequency signal interpolation method and high-frequency signal interpolation device |
KR101565919B1 (en) * | 2006-11-17 | 2015-11-05 | 삼성전자주식회사 | Method and apparatus for encoding and decoding high frequency signal |
US8639500B2 (en) | 2006-11-17 | 2014-01-28 | Samsung Electronics Co., Ltd. | Method, medium, and apparatus with bandwidth extension encoding and/or decoding |
KR101375582B1 (en) * | 2006-11-17 | 2014-03-20 | 삼성전자주식회사 | Method and apparatus for bandwidth extension encoding and decoding |
US8005671B2 (en) * | 2006-12-04 | 2011-08-23 | Qualcomm Incorporated | Systems and methods for dynamic normalization to reduce loss in precision for low-level signals |
GB2444757B (en) * | 2006-12-13 | 2009-04-22 | Motorola Inc | Code excited linear prediction speech coding |
US20080147389A1 (en) * | 2006-12-15 | 2008-06-19 | Motorola, Inc. | Method and Apparatus for Robust Speech Activity Detection |
FR2911031B1 (en) * | 2006-12-28 | 2009-04-10 | Actimagine Soc Par Actions Sim | AUDIO CODING METHOD AND DEVICE |
FR2911020B1 (en) * | 2006-12-28 | 2009-05-01 | Actimagine Soc Par Actions Sim | AUDIO CODING METHOD AND DEVICE |
KR101379263B1 (en) * | 2007-01-12 | 2014-03-28 | 삼성전자주식회사 | Method and apparatus for decoding bandwidth extension |
US7873064B1 (en) * | 2007-02-12 | 2011-01-18 | Marvell International Ltd. | Adaptive jitter buffer-packet loss concealment |
US8032359B2 (en) | 2007-02-14 | 2011-10-04 | Mindspeed Technologies, Inc. | Embedded silence and background noise compression |
GB0704622D0 (en) * | 2007-03-09 | 2007-04-18 | Skype Ltd | Speech coding system and method |
KR101411900B1 (en) * | 2007-05-08 | 2014-06-26 | 삼성전자주식회사 | Method and apparatus for encoding and decoding audio signal |
US9653088B2 (en) * | 2007-06-13 | 2017-05-16 | Qualcomm Incorporated | Systems, methods, and apparatus for signal encoding using pitch-regularizing and non-pitch-regularizing coding |
CA2698031C (en) * | 2007-08-27 | 2016-10-18 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and device for noise filling |
FR2920545B1 (en) * | 2007-09-03 | 2011-06-10 | Univ Sud Toulon Var | METHOD FOR THE MULTIPLE CHARACTEROGRAPHY OF CETACEANS BY PASSIVE ACOUSTICS |
JP5547081B2 (en) * | 2007-11-02 | 2014-07-09 | 華為技術有限公司 | Speech decoding method and apparatus |
EP2212884B1 (en) * | 2007-11-06 | 2013-01-02 | Nokia Corporation | An encoder |
US20100250260A1 (en) * | 2007-11-06 | 2010-09-30 | Lasse Laaksonen | Encoder |
CA2704807A1 (en) * | 2007-11-06 | 2009-05-14 | Nokia Corporation | Audio coding apparatus and method thereof |
KR101444099B1 (en) * | 2007-11-13 | 2014-09-26 | 삼성전자주식회사 | Method and apparatus for detecting voice activity |
CN101868821B (en) * | 2007-11-21 | 2015-09-23 | Lg电子株式会社 | For the treatment of the method and apparatus of signal |
US8050934B2 (en) * | 2007-11-29 | 2011-11-01 | Texas Instruments Incorporated | Local pitch control based on seamless time scale modification and synchronized sampling rate conversion |
US8688441B2 (en) * | 2007-11-29 | 2014-04-01 | Motorola Mobility Llc | Method and apparatus to facilitate provision and use of an energy value to determine a spectral envelope shape for out-of-signal bandwidth content |
TWI356399B (en) * | 2007-12-14 | 2012-01-11 | Ind Tech Res Inst | Speech recognition system and method with cepstral |
KR101439205B1 (en) * | 2007-12-21 | 2014-09-11 | 삼성전자주식회사 | Method and apparatus for audio matrix encoding/decoding |
US20100280833A1 (en) * | 2007-12-27 | 2010-11-04 | Panasonic Corporation | Encoding device, decoding device, and method thereof |
KR101413967B1 (en) * | 2008-01-29 | 2014-07-01 | 삼성전자주식회사 | Encoding method and decoding method of audio signal, and recording medium thereof, encoding apparatus and decoding apparatus of audio signal |
KR101413968B1 (en) * | 2008-01-29 | 2014-07-01 | 삼성전자주식회사 | Method and apparatus for encoding audio signal, and method and apparatus for decoding audio signal |
DE102008015702B4 (en) | 2008-01-31 | 2010-03-11 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Apparatus and method for bandwidth expansion of an audio signal |
US8433582B2 (en) * | 2008-02-01 | 2013-04-30 | Motorola Mobility Llc | Method and apparatus for estimating high-band energy in a bandwidth extension system |
US20090201983A1 (en) * | 2008-02-07 | 2009-08-13 | Motorola, Inc. | Method and apparatus for estimating high-band energy in a bandwidth extension system |
WO2009116815A2 (en) * | 2008-03-20 | 2009-09-24 | Samsung Electronics Co., Ltd. | Apparatus and method for encoding and decoding using bandwidth extension in portable terminal |
US8983832B2 (en) * | 2008-07-03 | 2015-03-17 | The Board Of Trustees Of The University Of Illinois | Systems and methods for identifying speech sound features |
EP2301021B1 (en) | 2008-07-10 | 2017-06-21 | VoiceAge Corporation | Device and method for quantizing lpc filters in a super-frame |
US8788276B2 (en) | 2008-07-11 | 2014-07-22 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. | Apparatus and method for calculating bandwidth extension data using a spectral tilt controlled framing |
MY154452A (en) * | 2008-07-11 | 2015-06-15 | Fraunhofer Ges Forschung | An apparatus and a method for decoding an encoded audio signal |
EP2410522B1 (en) * | 2008-07-11 | 2017-10-04 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Audio signal encoder, method for encoding an audio signal and computer program |
KR101614160B1 (en) | 2008-07-16 | 2016-04-20 | 한국전자통신연구원 | Apparatus for encoding and decoding multi-object audio supporting post downmix signal |
WO2010011963A1 (en) * | 2008-07-25 | 2010-01-28 | The Board Of Trustees Of The University Of Illinois | Methods and systems for identifying speech sounds using multi-dimensional analysis |
US8463412B2 (en) * | 2008-08-21 | 2013-06-11 | Motorola Mobility Llc | Method and apparatus to facilitate determining signal bounding frequencies |
US8352279B2 (en) | 2008-09-06 | 2013-01-08 | Huawei Technologies Co., Ltd. | Efficient temporal envelope coding approach by prediction between low band signal and high band signal |
WO2010028292A1 (en) * | 2008-09-06 | 2010-03-11 | Huawei Technologies Co., Ltd. | Adaptive frequency prediction |
WO2010028299A1 (en) * | 2008-09-06 | 2010-03-11 | Huawei Technologies Co., Ltd. | Noise-feedback for spectral envelope quantization |
US8515747B2 (en) * | 2008-09-06 | 2013-08-20 | Huawei Technologies Co., Ltd. | Spectrum harmonic/noise sharpness control |
WO2010028297A1 (en) | 2008-09-06 | 2010-03-11 | GH Innovation, Inc. | Selective bandwidth extension |
KR101178801B1 (en) * | 2008-12-09 | 2012-08-31 | 한국전자통신연구원 | Apparatus and method for speech recognition by using source separation and source identification |
US20100070550A1 (en) * | 2008-09-12 | 2010-03-18 | Cardinal Health 209 Inc. | Method and apparatus of a sensor amplifier configured for use in medical applications |
WO2010031003A1 (en) | 2008-09-15 | 2010-03-18 | Huawei Technologies Co., Ltd. | Adding second enhancement layer to celp based core layer |
US8577673B2 (en) * | 2008-09-15 | 2013-11-05 | Huawei Technologies Co., Ltd. | CELP post-processing for music signals |
US8831958B2 (en) * | 2008-09-25 | 2014-09-09 | Lg Electronics Inc. | Method and an apparatus for a bandwidth extension using different schemes |
WO2010053287A2 (en) * | 2008-11-04 | 2010-05-14 | Lg Electronics Inc. | An apparatus for processing an audio signal and method thereof |
DE102008058496B4 (en) * | 2008-11-21 | 2010-09-09 | Siemens Medical Instruments Pte. Ltd. | Filter bank system with specific stop attenuation components for a hearing device |
GB2466201B (en) * | 2008-12-10 | 2012-07-11 | Skype Ltd | Regeneration of wideband speech |
GB0822537D0 (en) | 2008-12-10 | 2009-01-14 | Skype Ltd | Regeneration of wideband speech |
US9947340B2 (en) * | 2008-12-10 | 2018-04-17 | Skype | Regeneration of wideband speech |
EP2360687A4 (en) * | 2008-12-19 | 2012-07-11 | Fujitsu Ltd | Voice band extension device and voice band extension method |
GB2466670B (en) * | 2009-01-06 | 2012-11-14 | Skype | Speech encoding |
GB2466669B (en) * | 2009-01-06 | 2013-03-06 | Skype | Speech coding |
GB2466674B (en) * | 2009-01-06 | 2013-11-13 | Skype | Speech coding |
GB2466671B (en) * | 2009-01-06 | 2013-03-27 | Skype | Speech encoding |
GB2466673B (en) * | 2009-01-06 | 2012-11-07 | Skype | Quantization |
GB2466675B (en) | 2009-01-06 | 2013-03-06 | Skype | Speech coding |
GB2466672B (en) * | 2009-01-06 | 2013-03-13 | Skype | Speech coding |
PL3598447T3 (en) | 2009-01-16 | 2022-02-14 | Dolby International Ab | Cross product enhanced harmonic transposition |
US8463599B2 (en) * | 2009-02-04 | 2013-06-11 | Motorola Mobility Llc | Bandwidth extension method and apparatus for a modified discrete cosine transform audio coder |
EP2555191A1 (en) * | 2009-03-31 | 2013-02-06 | Huawei Technologies Co., Ltd. | Method and device for audio signal denoising |
JP4932917B2 (en) * | 2009-04-03 | 2012-05-16 | 株式会社エヌ・ティ・ティ・ドコモ | Speech decoding apparatus, speech decoding method, and speech decoding program |
JP4921611B2 (en) * | 2009-04-03 | 2012-04-25 | 株式会社エヌ・ティ・ティ・ドコモ | Speech decoding apparatus, speech decoding method, and speech decoding program |
EP2434485A4 (en) * | 2009-05-19 | 2014-03-05 | Korea Electronics Telecomm | Method and apparatus for encoding and decoding audio signal using hierarchical sinusoidal pulse coding |
WO2011047887A1 (en) * | 2009-10-21 | 2011-04-28 | Dolby International Ab | Oversampling in a combined transposer filter bank |
US8000485B2 (en) * | 2009-06-01 | 2011-08-16 | Dts, Inc. | Virtual audio processing for loudspeaker or headphone playback |
CN101609680B (en) * | 2009-06-01 | 2012-01-04 | 华为技术有限公司 | Compression coding and decoding method, coder, decoder and coding device |
KR20110001130A (en) * | 2009-06-29 | 2011-01-06 | 삼성전자주식회사 | Apparatus and method for encoding and decoding audio signals using weighted linear prediction transform |
WO2011029484A1 (en) * | 2009-09-14 | 2011-03-17 | Nokia Corporation | Signal enhancement processing |
WO2011037587A1 (en) * | 2009-09-28 | 2011-03-31 | Nuance Communications, Inc. | Downsampling schemes in a hierarchical neural network structure for phoneme recognition |
US8452606B2 (en) * | 2009-09-29 | 2013-05-28 | Skype | Speech encoding using multiple bit rates |
JP5754899B2 (en) * | 2009-10-07 | 2015-07-29 | ソニー株式会社 | Decoding apparatus and method, and program |
EP2491553B1 (en) | 2009-10-20 | 2016-10-12 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Audio encoder, audio decoder, method for encoding an audio information, method for decoding an audio information and computer program using an iterative interval size reduction |
EP2360688B1 (en) | 2009-10-21 | 2018-12-05 | Panasonic Intellectual Property Corporation of America | Apparatus, method and program for audio signal processing |
US8484020B2 (en) | 2009-10-23 | 2013-07-09 | Qualcomm Incorporated | Determining an upperband signal from a narrowband signal |
RU2568278C2 (en) * | 2009-11-19 | 2015-11-20 | Телефонактиеболагет Лм Эрикссон (Пабл) | Bandwidth extension for low-band audio signal |
CN102714041B (en) * | 2009-11-19 | 2014-04-16 | 瑞典爱立信有限公司 | Improved excitation signal bandwidth extension |
US8489393B2 (en) * | 2009-11-23 | 2013-07-16 | Cambridge Silicon Radio Limited | Speech intelligibility |
US9838784B2 (en) | 2009-12-02 | 2017-12-05 | Knowles Electronics, Llc | Directional audio capture |
RU2464651C2 (en) * | 2009-12-22 | 2012-10-20 | Общество с ограниченной ответственностью "Спирит Корп" | Method and apparatus for multilevel scalable information loss tolerant speech encoding for packet switched networks |
US20110167445A1 (en) * | 2010-01-06 | 2011-07-07 | Reams Robert W | Audiovisual content channelization system |
US8326607B2 (en) * | 2010-01-11 | 2012-12-04 | Sony Ericsson Mobile Communications Ab | Method and arrangement for enhancing speech quality |
CN102792370B (en) * | 2010-01-12 | 2014-08-06 | 弗劳恩霍弗实用研究促进协会 | Audio encoder, audio decoder, method for encoding and audio information and method for decoding an audio information using a hash table describing both significant state values and interval boundaries |
US9525569B2 (en) * | 2010-03-03 | 2016-12-20 | Skype | Enhanced circuit-switched calls |
EP2532001B1 (en) * | 2010-03-10 | 2014-04-02 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Audio signal decoder, audio signal encoder, methods and computer program using a sampling rate dependent time-warp contour encoding |
US8700391B1 (en) * | 2010-04-01 | 2014-04-15 | Audience, Inc. | Low complexity bandwidth expansion of speech |
US20130024191A1 (en) * | 2010-04-12 | 2013-01-24 | Freescale Semiconductor, Inc. | Audio communication device, method for outputting an audio signal, and communication system |
JP5850216B2 (en) | 2010-04-13 | 2016-02-03 | ソニー株式会社 | Signal processing apparatus and method, encoding apparatus and method, decoding apparatus and method, and program |
JP5652658B2 (en) | 2010-04-13 | 2015-01-14 | ソニー株式会社 | Signal processing apparatus and method, encoding apparatus and method, decoding apparatus and method, and program |
JP5609737B2 (en) | 2010-04-13 | 2014-10-22 | ソニー株式会社 | Signal processing apparatus and method, encoding apparatus and method, decoding apparatus and method, and program |
US9443534B2 (en) * | 2010-04-14 | 2016-09-13 | Huawei Technologies Co., Ltd. | Bandwidth extension system and approach |
EP2559028B1 (en) * | 2010-04-14 | 2015-09-16 | VoiceAge Corporation | Flexible and scalable combined innovation codebook for use in celp coder and decoder |
TR201904117T4 (en) * | 2010-04-16 | 2019-05-21 | Fraunhofer Ges Forschung | Apparatus, method and computer program for generating a broadband signal using guided bandwidth extension and blind bandwidth extension. |
US8473287B2 (en) | 2010-04-19 | 2013-06-25 | Audience, Inc. | Method for jointly optimizing noise reduction and voice quality in a mono or multi-microphone system |
US8538035B2 (en) | 2010-04-29 | 2013-09-17 | Audience, Inc. | Multi-microphone robust noise suppression |
US8798290B1 (en) | 2010-04-21 | 2014-08-05 | Audience, Inc. | Systems and methods for adaptive signal equalization |
US8781137B1 (en) | 2010-04-27 | 2014-07-15 | Audience, Inc. | Wind noise detection and suppression |
US9378754B1 (en) | 2010-04-28 | 2016-06-28 | Knowles Electronics, Llc | Adaptive spatial classifier for multi-microphone systems |
US9558755B1 (en) | 2010-05-20 | 2017-01-31 | Knowles Electronics, Llc | Noise suppression assisted automatic speech recognition |
KR101660843B1 (en) * | 2010-05-27 | 2016-09-29 | 삼성전자주식회사 | Apparatus and method for determining weighting function for lpc coefficients quantization |
US8600737B2 (en) | 2010-06-01 | 2013-12-03 | Qualcomm Incorporated | Systems, methods, apparatus, and computer program products for wideband speech coding |
IL311020A (en) | 2010-07-02 | 2024-04-01 | Dolby Int Ab | Selective bass post filter |
US8447596B2 (en) | 2010-07-12 | 2013-05-21 | Audience, Inc. | Monaural noise suppression based on computational auditory scene analysis |
JP5589631B2 (en) * | 2010-07-15 | 2014-09-17 | 富士通株式会社 | Voice processing apparatus, voice processing method, and telephone apparatus |
CN102985966B (en) | 2010-07-16 | 2016-07-06 | 瑞典爱立信有限公司 | Audio coder and decoder and the method for the coding of audio signal and decoding |
JP5777041B2 (en) * | 2010-07-23 | 2015-09-09 | 沖電気工業株式会社 | Band expansion device and program, and voice communication device |
JP6075743B2 (en) | 2010-08-03 | 2017-02-08 | ソニー株式会社 | Signal processing apparatus and method, and program |
US20130310422A1 (en) | 2010-09-01 | 2013-11-21 | The General Hospital Corporation | Reversal of general anesthesia by administration of methylphenidate, amphetamine, modafinil, amantadine, and/or caffeine |
DK2617035T3 (en) | 2010-09-16 | 2019-01-02 | Dolby Int Ab | CROSS-PRODUCT-ENHANCED SUBBOND BLOCK BASED HARMONIC TRANSPOSITION |
US8924200B2 (en) | 2010-10-15 | 2014-12-30 | Motorola Mobility Llc | Audio signal bandwidth extension in CELP-based speech coder |
JP5707842B2 (en) | 2010-10-15 | 2015-04-30 | ソニー株式会社 | Encoding apparatus and method, decoding apparatus and method, and program |
WO2012053149A1 (en) * | 2010-10-22 | 2012-04-26 | パナソニック株式会社 | Speech analyzing device, quantization device, inverse quantization device, and method for same |
JP5743137B2 (en) * | 2011-01-14 | 2015-07-01 | ソニー株式会社 | Signal processing apparatus and method, and program |
US9767822B2 (en) | 2011-02-07 | 2017-09-19 | Qualcomm Incorporated | Devices for encoding and decoding a watermarked signal |
US9767823B2 (en) | 2011-02-07 | 2017-09-19 | Qualcomm Incorporated | Devices for encoding and detecting a watermarked signal |
CN105304090B (en) | 2011-02-14 | 2019-04-09 | 弗劳恩霍夫应用研究促进协会 | Using the prediction part of alignment by audio-frequency signal coding and decoded apparatus and method |
BR112013020588B1 (en) | 2011-02-14 | 2021-07-13 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | APPARATUS AND METHOD FOR ENCODING A PART OF AN AUDIO SIGNAL USING A TRANSIENT DETECTION AND A QUALITY RESULT |
PT2676267T (en) | 2011-02-14 | 2017-09-26 | Fraunhofer Ges Forschung | Encoding and decoding of pulse positions of tracks of an audio signal |
EP2676262B1 (en) * | 2011-02-14 | 2018-04-25 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Noise generation in audio codecs |
SG192718A1 (en) | 2011-02-14 | 2013-09-30 | Fraunhofer Ges Forschung | Audio codec using noise synthesis during inactive phases |
ES2529025T3 (en) | 2011-02-14 | 2015-02-16 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Apparatus and method for processing a decoded audio signal in a spectral domain |
MX2012013025A (en) | 2011-02-14 | 2013-01-22 | Fraunhofer Ges Forschung | Information signal representation using lapped transform. |
TWI484479B (en) | 2011-02-14 | 2015-05-11 | Fraunhofer Ges Forschung | Apparatus and method for error concealment in low-delay unified speech and audio coding |
MY159444A (en) | 2011-02-14 | 2017-01-13 | Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forschung E V | Encoding and decoding of pulse positions of tracks of an audio signal |
ES2727131T3 (en) | 2011-02-16 | 2019-10-14 | Dolby Laboratories Licensing Corp | Decoder with configurable filters |
PL2677519T3 (en) * | 2011-02-18 | 2019-12-31 | Ntt Docomo, Inc. | Speech decoder, speech encoder, speech decoding method, speech encoding method, speech decoding program, and speech encoding program |
WO2012122397A1 (en) | 2011-03-09 | 2012-09-13 | Srs Labs, Inc. | System for dynamically creating and rendering audio objects |
US9760566B2 (en) | 2011-03-31 | 2017-09-12 | Microsoft Technology Licensing, Llc | Augmented conversational understanding agent to identify conversation context between two humans and taking an agent action thereof |
US9244984B2 (en) | 2011-03-31 | 2016-01-26 | Microsoft Technology Licensing, Llc | Location based conversational understanding |
US9298287B2 (en) | 2011-03-31 | 2016-03-29 | Microsoft Technology Licensing, Llc | Combined activation for natural user interface systems |
JP5704397B2 (en) * | 2011-03-31 | 2015-04-22 | ソニー株式会社 | Encoding apparatus and method, and program |
US9842168B2 (en) | 2011-03-31 | 2017-12-12 | Microsoft Technology Licensing, Llc | Task driven user intents |
US10642934B2 (en) | 2011-03-31 | 2020-05-05 | Microsoft Technology Licensing, Llc | Augmented conversational understanding architecture |
US9064006B2 (en) | 2012-08-23 | 2015-06-23 | Microsoft Technology Licensing, Llc | Translating natural language utterances to keyword search queries |
CN102811034A (en) | 2011-05-31 | 2012-12-05 | 财团法人工业技术研究院 | Signal processing device and signal processing method |
US9264094B2 (en) * | 2011-06-09 | 2016-02-16 | Panasonic Intellectual Property Corporation Of America | Voice coding device, voice decoding device, voice coding method and voice decoding method |
US9070361B2 (en) * | 2011-06-10 | 2015-06-30 | Google Technology Holdings LLC | Method and apparatus for encoding a wideband speech signal utilizing downmixing of a highband component |
MX350162B (en) * | 2011-06-30 | 2017-08-29 | Samsung Electronics Co Ltd | Apparatus and method for generating bandwidth extension signal. |
US9059786B2 (en) * | 2011-07-07 | 2015-06-16 | Vecima Networks Inc. | Ingress suppression for communication systems |
JP5942358B2 (en) | 2011-08-24 | 2016-06-29 | ソニー株式会社 | Encoding apparatus and method, decoding apparatus and method, and program |
RU2486636C1 (en) * | 2011-11-14 | 2013-06-27 | Федеральное государственное военное образовательное учреждение высшего профессионального образования "Военный авиационный инженерный университет" (г. Воронеж) Министерства обороны Российской Федерации | Method of generating high-frequency signals and apparatus for realising said method |
RU2486638C1 (en) * | 2011-11-15 | 2013-06-27 | Федеральное государственное военное образовательное учреждение высшего профессионального образования "Военный авиационный инженерный университет" (г. Воронеж) Министерства обороны Российской Федерации | Method of generating high-frequency signals and apparatus for realising said method |
RU2486637C1 (en) * | 2011-11-15 | 2013-06-27 | Федеральное государственное военное образовательное учреждение высшего профессионального образования "Военный авиационный инженерный университет" (г. Воронеж) Министерства обороны Российской Федерации | Method for generation and frequency-modulation of high-frequency signals and apparatus for realising said method |
RU2496222C2 (en) * | 2011-11-17 | 2013-10-20 | Федеральное государственное образовательное учреждение высшего профессионального образования "Военный авиационный инженерный университет" (г. Воронеж) Министерства обороны Российской Федерации | Method for generation and frequency-modulation of high-frequency signals and apparatus for realising said method |
RU2486639C1 (en) * | 2011-11-21 | 2013-06-27 | Федеральное государственное военное образовательное учреждение высшего профессионального образования "Военный авиационный инженерный университет" (г. Воронеж) Министерства обороны Российской Федерации | Method for generation and frequency-modulation of high-frequency signals and apparatus for realising said method |
RU2496192C2 (en) * | 2011-11-21 | 2013-10-20 | Федеральное государственное военное образовательное учреждение высшего профессионального образования "Военный авиационный инженерный университет" (г. Воронеж) Министерства обороны Российской Федерации | Method for generation and frequency-modulation of high-frequency signals and apparatus for realising said method |
RU2490727C2 (en) * | 2011-11-28 | 2013-08-20 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Уральский государственный университет путей сообщения" (УрГУПС) | Method of transmitting speech signals (versions) |
RU2487443C1 (en) * | 2011-11-29 | 2013-07-10 | Федеральное государственное военное образовательное учреждение высшего профессионального образования "Военный авиационный инженерный университет" (г. Воронеж) Министерства обороны Российской Федерации | Method of matching complex impedances and apparatus for realising said method |
JP5817499B2 (en) * | 2011-12-15 | 2015-11-18 | 富士通株式会社 | Decoding device, encoding device, encoding / decoding system, decoding method, encoding method, decoding program, and encoding program |
US9972325B2 (en) * | 2012-02-17 | 2018-05-15 | Huawei Technologies Co., Ltd. | System and method for mixed codebook excitation for speech coding |
US9082398B2 (en) * | 2012-02-28 | 2015-07-14 | Huawei Technologies Co., Ltd. | System and method for post excitation enhancement for low bit rate speech coding |
US9437213B2 (en) * | 2012-03-05 | 2016-09-06 | Malaspina Labs (Barbados) Inc. | Voice signal enhancement |
EP2830062B1 (en) * | 2012-03-21 | 2019-11-20 | Samsung Electronics Co., Ltd. | Method and apparatus for high-frequency encoding/decoding for bandwidth extension |
ES2960582T3 (en) | 2012-03-29 | 2024-03-05 | Ericsson Telefon Ab L M | Vector quantifier |
US10448161B2 (en) | 2012-04-02 | 2019-10-15 | Qualcomm Incorporated | Systems, methods, apparatus, and computer-readable media for gestural manipulation of a sound field |
JP5998603B2 (en) * | 2012-04-18 | 2016-09-28 | ソニー株式会社 | Sound detection device, sound detection method, sound feature amount detection device, sound feature amount detection method, sound interval detection device, sound interval detection method, and program |
KR101343768B1 (en) * | 2012-04-19 | 2014-01-16 | 충북대학교 산학협력단 | Method for speech and audio signal classification using Spectral flux pattern |
RU2504894C1 (en) * | 2012-05-17 | 2014-01-20 | Федеральное государственное военное образовательное учреждение высшего профессионального образования "Военный авиационный инженерный университет" (г. Воронеж) Министерства обороны Российской Федерации | Method of demodulating phase-modulated and frequency-modulated signals and apparatus for realising said method |
RU2504898C1 (en) * | 2012-05-17 | 2014-01-20 | Федеральное государственное военное образовательное учреждение высшего профессионального образования "Военный авиационный инженерный университет" (г. Воронеж) Министерства обороны Российской Федерации | Method of demodulating phase-modulated and frequency-modulated signals and apparatus for realising said method |
US20140006017A1 (en) * | 2012-06-29 | 2014-01-02 | Qualcomm Incorporated | Systems, methods, apparatus, and computer-readable media for generating obfuscated speech signal |
JP6127143B2 (en) * | 2012-08-31 | 2017-05-10 | テレフオンアクチーボラゲット エルエム エリクソン(パブル) | Method and apparatus for voice activity detection |
WO2014062859A1 (en) * | 2012-10-16 | 2014-04-24 | Audiologicall, Ltd. | Audio signal manipulation for speech enhancement before sound reproduction |
KR101413969B1 (en) | 2012-12-20 | 2014-07-08 | 삼성전자주식회사 | Method and apparatus for decoding audio signal |
CN105551497B (en) | 2013-01-15 | 2019-03-19 | 华为技术有限公司 | Coding method, coding/decoding method, encoding apparatus and decoding apparatus |
ES2626977T3 (en) * | 2013-01-29 | 2017-07-26 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Apparatus, procedure and computer medium to synthesize an audio signal |
CN106847297B (en) | 2013-01-29 | 2020-07-07 | 华为技术有限公司 | Prediction method of high-frequency band signal, encoding/decoding device |
US9728200B2 (en) | 2013-01-29 | 2017-08-08 | Qualcomm Incorporated | Systems, methods, apparatus, and computer-readable media for adaptive formant sharpening in linear prediction coding |
US20140213909A1 (en) * | 2013-01-31 | 2014-07-31 | Xerox Corporation | Control-based inversion for estimating a biological parameter vector for a biophysics model from diffused reflectance data |
US9601125B2 (en) * | 2013-02-08 | 2017-03-21 | Qualcomm Incorporated | Systems and methods of performing noise modulation and gain adjustment |
US9711156B2 (en) | 2013-02-08 | 2017-07-18 | Qualcomm Incorporated | Systems and methods of performing filtering for gain determination |
US9741350B2 (en) * | 2013-02-08 | 2017-08-22 | Qualcomm Incorporated | Systems and methods of performing gain control |
US9336789B2 (en) * | 2013-02-21 | 2016-05-10 | Qualcomm Incorporated | Systems and methods for determining an interpolation factor set for synthesizing a speech signal |
WO2014136629A1 (en) * | 2013-03-05 | 2014-09-12 | 日本電気株式会社 | Signal processing device, signal processing method, and signal processing program |
EP2784775B1 (en) * | 2013-03-27 | 2016-09-14 | Binauric SE | Speech signal encoding/decoding method and apparatus |
RU2665228C1 (en) * | 2013-04-05 | 2018-08-28 | Долби Интернэшнл Аб | Audio encoder and decoder for interlace waveform encoding |
CN105264600B (en) * | 2013-04-05 | 2019-06-07 | Dts有限责任公司 | Hierarchical audio coding and transmission |
MX343673B (en) | 2013-04-05 | 2016-11-16 | Dolby Int Ab | Audio encoder and decoder. |
PL3011554T3 (en) * | 2013-06-21 | 2019-12-31 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Pitch lag estimation |
FR3007563A1 (en) * | 2013-06-25 | 2014-12-26 | France Telecom | ENHANCED FREQUENCY BAND EXTENSION IN AUDIO FREQUENCY SIGNAL DECODER |
US10314503B2 (en) | 2013-06-27 | 2019-06-11 | The General Hospital Corporation | Systems and methods for tracking non-stationary spectral structure and dynamics in physiological data |
US10383574B2 (en) | 2013-06-28 | 2019-08-20 | The General Hospital Corporation | Systems and methods to infer brain state during burst suppression |
FR3008533A1 (en) | 2013-07-12 | 2015-01-16 | Orange | OPTIMIZED SCALE FACTOR FOR FREQUENCY BAND EXTENSION IN AUDIO FREQUENCY SIGNAL DECODER |
EP2830063A1 (en) | 2013-07-22 | 2015-01-28 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Apparatus, method and computer program for decoding an encoded audio signal |
CN110890101B (en) * | 2013-08-28 | 2024-01-12 | 杜比实验室特许公司 | Method and apparatus for decoding based on speech enhancement metadata |
TWI557726B (en) * | 2013-08-29 | 2016-11-11 | 杜比國際公司 | System and method for determining a master scale factor band table for a highband signal of an audio signal |
US10602978B2 (en) | 2013-09-13 | 2020-03-31 | The General Hospital Corporation | Systems and methods for improved brain monitoring during general anesthesia and sedation |
JP6531649B2 (en) | 2013-09-19 | 2019-06-19 | ソニー株式会社 | Encoding apparatus and method, decoding apparatus and method, and program |
CN108172239B (en) * | 2013-09-26 | 2021-01-12 | 华为技术有限公司 | Method and device for expanding frequency band |
CN104517611B (en) | 2013-09-26 | 2016-05-25 | 华为技术有限公司 | A kind of high-frequency excitation signal Forecasting Methodology and device |
US9224402B2 (en) | 2013-09-30 | 2015-12-29 | International Business Machines Corporation | Wideband speech parameterization for high quality synthesis, transformation and quantization |
US9620134B2 (en) * | 2013-10-10 | 2017-04-11 | Qualcomm Incorporated | Gain shape estimation for improved tracking of high-band temporal characteristics |
US10083708B2 (en) * | 2013-10-11 | 2018-09-25 | Qualcomm Incorporated | Estimation of mixing factors to generate high-band excitation signal |
US9384746B2 (en) * | 2013-10-14 | 2016-07-05 | Qualcomm Incorporated | Systems and methods of energy-scaled signal processing |
KR102271852B1 (en) * | 2013-11-02 | 2021-07-01 | 삼성전자주식회사 | Method and apparatus for generating wideband signal and device employing the same |
EP2871641A1 (en) * | 2013-11-12 | 2015-05-13 | Dialog Semiconductor B.V. | Enhancement of narrowband audio signals using a single sideband AM modulation |
US9858941B2 (en) | 2013-11-22 | 2018-01-02 | Qualcomm Incorporated | Selective phase compensation in high band coding of an audio signal |
US10163447B2 (en) * | 2013-12-16 | 2018-12-25 | Qualcomm Incorporated | High-band signal modeling |
RU2764260C2 (en) | 2013-12-27 | 2022-01-14 | Сони Корпорейшн | Decoding device and method |
CN103714822B (en) * | 2013-12-27 | 2017-01-11 | 广州华多网络科技有限公司 | Sub-band coding and decoding method and device based on SILK coder decoder |
FR3017484A1 (en) * | 2014-02-07 | 2015-08-14 | Orange | ENHANCED FREQUENCY BAND EXTENSION IN AUDIO FREQUENCY SIGNAL DECODER |
US9564141B2 (en) | 2014-02-13 | 2017-02-07 | Qualcomm Incorporated | Harmonic bandwidth extension of audio signals |
JP6281336B2 (en) * | 2014-03-12 | 2018-02-21 | 沖電気工業株式会社 | Speech decoding apparatus and program |
JP6035270B2 (en) * | 2014-03-24 | 2016-11-30 | 株式会社Nttドコモ | Speech decoding apparatus, speech encoding apparatus, speech decoding method, speech encoding method, speech decoding program, and speech encoding program |
RU2689181C2 (en) * | 2014-03-31 | 2019-05-24 | Фраунхофер-Гезелльшафт Цур Фердерунг Дер Ангевандтен Форшунг Е.Ф. | Encoder, decoder, encoding method, decoding method and program |
US9542955B2 (en) * | 2014-03-31 | 2017-01-10 | Qualcomm Incorporated | High-band signal coding using multiple sub-bands |
US9697843B2 (en) * | 2014-04-30 | 2017-07-04 | Qualcomm Incorporated | High band excitation signal generation |
CN106409304B (en) * | 2014-06-12 | 2020-08-25 | 华为技术有限公司 | Time domain envelope processing method and device of audio signal and encoder |
CN107424622B (en) | 2014-06-24 | 2020-12-25 | 华为技术有限公司 | Audio encoding method and apparatus |
US9984699B2 (en) | 2014-06-26 | 2018-05-29 | Qualcomm Incorporated | High-band signal coding using mismatched frequency ranges |
US9626983B2 (en) * | 2014-06-26 | 2017-04-18 | Qualcomm Incorporated | Temporal gain adjustment based on high-band signal characteristic |
CN105225670B (en) * | 2014-06-27 | 2016-12-28 | 华为技术有限公司 | A kind of audio coding method and device |
US9721584B2 (en) * | 2014-07-14 | 2017-08-01 | Intel IP Corporation | Wind noise reduction for audio reception |
EP2980794A1 (en) | 2014-07-28 | 2016-02-03 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Audio encoder and decoder using a frequency domain processor and a time domain processor |
EP2980798A1 (en) | 2014-07-28 | 2016-02-03 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Harmonicity-dependent controlling of a harmonic filter tool |
EP2980795A1 (en) | 2014-07-28 | 2016-02-03 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Audio encoding and decoding using a frequency domain processor, a time domain processor and a cross processor for initialization of the time domain processor |
WO2016024853A1 (en) * | 2014-08-15 | 2016-02-18 | 삼성전자 주식회사 | Sound quality improving method and device, sound decoding method and device, and multimedia device employing same |
CN104217730B (en) * | 2014-08-18 | 2017-07-21 | 大连理工大学 | A kind of artificial speech bandwidth expanding method and device based on K SVD |
WO2016040885A1 (en) | 2014-09-12 | 2016-03-17 | Audience, Inc. | Systems and methods for restoration of speech components |
TWI550945B (en) * | 2014-12-22 | 2016-09-21 | 國立彰化師範大學 | Method of designing composite filters with sharp transition bands and cascaded composite filters |
US9595269B2 (en) * | 2015-01-19 | 2017-03-14 | Qualcomm Incorporated | Scaling for gain shape circuitry |
CN107210824A (en) | 2015-01-30 | 2017-09-26 | 美商楼氏电子有限公司 | The environment changing of microphone |
MX2017010593A (en) | 2015-02-26 | 2018-05-07 | Fraunhofer Ges Forschung | Apparatus and method for processing an audio signal to obtain a processed audio signal using a target time-domain envelope. |
US10847170B2 (en) * | 2015-06-18 | 2020-11-24 | Qualcomm Incorporated | Device and method for generating a high-band signal from non-linearly processed sub-ranges |
US9837089B2 (en) * | 2015-06-18 | 2017-12-05 | Qualcomm Incorporated | High-band signal generation |
US9407989B1 (en) | 2015-06-30 | 2016-08-02 | Arthur Woodrow | Closed audio circuit |
US9830921B2 (en) * | 2015-08-17 | 2017-11-28 | Qualcomm Incorporated | High-band target signal control |
CN107924683B (en) * | 2015-10-15 | 2021-03-30 | 华为技术有限公司 | Sinusoidal coding and decoding method and device |
NO339664B1 (en) | 2015-10-15 | 2017-01-23 | St Tech As | A system for isolating an object |
AU2017219696B2 (en) | 2016-02-17 | 2018-11-08 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Post-processor, pre-processor, audio encoder, audio decoder and related methods for enhancing transient processing |
FR3049084B1 (en) | 2016-03-15 | 2022-11-11 | Fraunhofer Ges Forschung | CODING DEVICE FOR PROCESSING AN INPUT SIGNAL AND DECODING DEVICE FOR PROCESSING A CODED SIGNAL |
CN109313908B (en) * | 2016-04-12 | 2023-09-22 | 弗劳恩霍夫应用研究促进协会 | Audio encoder and method for encoding an audio signal |
US10770088B2 (en) * | 2016-05-10 | 2020-09-08 | Immersion Networks, Inc. | Adaptive audio decoder system, method and article |
CA3024167A1 (en) * | 2016-05-10 | 2017-11-16 | Immersion Services LLC | Adaptive audio codec system, method, apparatus and medium |
US10699725B2 (en) * | 2016-05-10 | 2020-06-30 | Immersion Networks, Inc. | Adaptive audio encoder system, method and article |
US20170330575A1 (en) * | 2016-05-10 | 2017-11-16 | Immersion Services LLC | Adaptive audio codec system, method and article |
US10756755B2 (en) * | 2016-05-10 | 2020-08-25 | Immersion Networks, Inc. | Adaptive audio codec system, method and article |
US10264116B2 (en) * | 2016-11-02 | 2019-04-16 | Nokia Technologies Oy | Virtual duplex operation |
KR102507383B1 (en) * | 2016-11-08 | 2023-03-08 | 한국전자통신연구원 | Method and system for stereo matching by using rectangular window |
WO2018102402A1 (en) | 2016-11-29 | 2018-06-07 | The General Hospital Corporation | Systems and methods for analyzing electrophysiological data from patients undergoing medical treatments |
EP3965354B1 (en) * | 2017-01-06 | 2023-05-03 | Telefonaktiebolaget LM Ericsson (publ) | Methods and apparatuses for signaling and determining reference signal offsets |
KR20180092582A (en) * | 2017-02-10 | 2018-08-20 | 삼성전자주식회사 | WFST decoding system, speech recognition system including the same and Method for stroing WFST data |
US10553222B2 (en) * | 2017-03-09 | 2020-02-04 | Qualcomm Incorporated | Inter-channel bandwidth extension spectral mapping and adjustment |
US10304468B2 (en) * | 2017-03-20 | 2019-05-28 | Qualcomm Incorporated | Target sample generation |
TWI807562B (en) * | 2017-03-23 | 2023-07-01 | 瑞典商都比國際公司 | Backward-compatible integration of harmonic transposer for high frequency reconstruction of audio signals |
US10825467B2 (en) * | 2017-04-21 | 2020-11-03 | Qualcomm Incorporated | Non-harmonic speech detection and bandwidth extension in a multi-source environment |
US20190051286A1 (en) * | 2017-08-14 | 2019-02-14 | Microsoft Technology Licensing, Llc | Normalization of high band signals in network telephony communications |
US11876659B2 (en) | 2017-10-27 | 2024-01-16 | Terawave, Llc | Communication system using shape-shifted sinusoidal waveforms |
JP7057428B2 (en) * | 2017-10-27 | 2022-04-19 | テラウェーブ,エルエルシー | Receiver for high spectral efficiency data communication system using coded sinusoidal waveform |
CN109729553B (en) * | 2017-10-30 | 2021-12-28 | 成都鼎桥通信技术有限公司 | Voice service processing method and device of LTE (Long term evolution) trunking communication system |
EP3483878A1 (en) | 2017-11-10 | 2019-05-15 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Audio decoder supporting a set of different loss concealment tools |
EP3483884A1 (en) | 2017-11-10 | 2019-05-15 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Signal filtering |
EP3483879A1 (en) | 2017-11-10 | 2019-05-15 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Analysis/synthesis windowing function for modulated lapped transformation |
EP3483883A1 (en) * | 2017-11-10 | 2019-05-15 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Audio coding and decoding with selective postfiltering |
EP3483882A1 (en) | 2017-11-10 | 2019-05-15 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Controlling bandwidth in encoders and/or decoders |
WO2019091576A1 (en) | 2017-11-10 | 2019-05-16 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Audio encoders, audio decoders, methods and computer programs adapting an encoding and decoding of least significant bits |
EP3483886A1 (en) | 2017-11-10 | 2019-05-15 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Selecting pitch lag |
EP3483880A1 (en) | 2017-11-10 | 2019-05-15 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Temporal noise shaping |
WO2019091573A1 (en) | 2017-11-10 | 2019-05-16 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Apparatus and method for encoding and decoding an audio signal using downsampling or interpolation of scale parameters |
US10460749B1 (en) * | 2018-06-28 | 2019-10-29 | Nuvoton Technology Corporation | Voice activity detection using vocal tract area information |
US10847172B2 (en) * | 2018-12-17 | 2020-11-24 | Microsoft Technology Licensing, Llc | Phase quantization in a speech encoder |
US10957331B2 (en) | 2018-12-17 | 2021-03-23 | Microsoft Technology Licensing, Llc | Phase reconstruction in a speech decoder |
JP7088403B2 (en) * | 2019-02-20 | 2022-06-21 | ヤマハ株式会社 | Sound signal generation method, generative model training method, sound signal generation system and program |
CN110610713B (en) * | 2019-08-28 | 2021-11-16 | 南京梧桐微电子科技有限公司 | Vocoder residue spectrum amplitude parameter reconstruction method and system |
US11380343B2 (en) | 2019-09-12 | 2022-07-05 | Immersion Networks, Inc. | Systems and methods for processing high frequency audio signal |
TWI723545B (en) | 2019-09-17 | 2021-04-01 | 宏碁股份有限公司 | Speech processing method and device thereof |
US11295751B2 (en) | 2019-09-20 | 2022-04-05 | Tencent America LLC | Multi-band synchronized neural vocoder |
KR102201169B1 (en) * | 2019-10-23 | 2021-01-11 | 성균관대학교 산학협력단 | Method for generating time code and space-time code for controlling reflection coefficient of meta surface, recording medium storing program for executing the same, and method for signal modulation using meta surface |
CN114548442B (en) * | 2022-02-25 | 2022-10-21 | 万表名匠(广州)科技有限公司 | Wristwatch maintenance management system based on internet technology |
Family Cites Families (148)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US321993A (en) * | 1885-07-14 | Lantern | ||
US525147A (en) * | 1894-08-28 | Steam-cooker | ||
US526468A (en) * | 1894-09-25 | Charles d | ||
US596689A (en) * | 1898-01-04 | Hose holder or support | ||
US1126620A (en) * | 1911-01-30 | 1915-01-26 | Safety Car Heating & Lighting | Electric regulation. |
US1089258A (en) * | 1914-01-13 | 1914-03-03 | James Arnot Paterson | Facing or milling machine. |
US1300833A (en) * | 1918-12-12 | 1919-04-15 | Moline Mill Mfg Company | Idler-pulley structure. |
US1498873A (en) * | 1924-04-19 | 1924-06-24 | Bethlehem Steel Corp | Switch stand |
US2073913A (en) * | 1934-06-26 | 1937-03-16 | Wigan Edmund Ramsay | Means for gauging minute displacements |
US2086867A (en) * | 1936-06-19 | 1937-07-13 | Hall Lab Inc | Laundering composition and process |
US3044777A (en) * | 1959-10-19 | 1962-07-17 | Fibermold Corp | Bowling pin |
US3158693A (en) * | 1962-08-07 | 1964-11-24 | Bell Telephone Labor Inc | Speech interpolation communication system |
US3855416A (en) * | 1972-12-01 | 1974-12-17 | F Fuller | Method and apparatus for phonation analysis leading to valid truth/lie decisions by fundamental speech-energy weighted vibratto component assessment |
US3855414A (en) | 1973-04-24 | 1974-12-17 | Anaconda Co | Cable armor clamp |
JPS59139099A (en) | 1983-01-31 | 1984-08-09 | 株式会社東芝 | Voice section detector |
US4616659A (en) * | 1985-05-06 | 1986-10-14 | At&T Bell Laboratories | Heart rate detection utilizing autoregressive analysis |
US4630305A (en) | 1985-07-01 | 1986-12-16 | Motorola, Inc. | Automatic gain selector for a noise suppression system |
US4747143A (en) | 1985-07-12 | 1988-05-24 | Westinghouse Electric Corp. | Speech enhancement system having dynamic gain control |
NL8503152A (en) * | 1985-11-15 | 1987-06-01 | Optische Ind De Oude Delft Nv | DOSEMETER FOR IONIZING RADIATION. |
US4862168A (en) | 1987-03-19 | 1989-08-29 | Beard Terry D | Audio digital/analog encoding and decoding |
US4805193A (en) | 1987-06-04 | 1989-02-14 | Motorola, Inc. | Protection of energy information in sub-band coding |
US4852179A (en) * | 1987-10-05 | 1989-07-25 | Motorola, Inc. | Variable frame rate, fixed bit rate vocoding method |
JP2707564B2 (en) | 1987-12-14 | 1998-01-28 | 株式会社日立製作所 | Audio coding method |
US5285520A (en) | 1988-03-02 | 1994-02-08 | Kokusai Denshin Denwa Kabushiki Kaisha | Predictive coding apparatus |
US5077798A (en) | 1988-09-28 | 1991-12-31 | Hitachi, Ltd. | Method and system for voice coding based on vector quantization |
US5086475A (en) | 1988-11-19 | 1992-02-04 | Sony Corporation | Apparatus for generating, recording or reproducing sound source data |
JPH02244100A (en) | 1989-03-16 | 1990-09-28 | Ricoh Co Ltd | Noise sound source signal forming device |
AU642540B2 (en) | 1990-09-19 | 1993-10-21 | Philips Electronics N.V. | Record carrier on which a main data file and a control file have been recorded, method of and device for recording the main data file and the control file, and device for reading the record carrier |
JP2779886B2 (en) | 1992-10-05 | 1998-07-23 | 日本電信電話株式会社 | Wideband audio signal restoration method |
JP3191457B2 (en) | 1992-10-31 | 2001-07-23 | ソニー株式会社 | High efficiency coding apparatus, noise spectrum changing apparatus and method |
US5455888A (en) | 1992-12-04 | 1995-10-03 | Northern Telecom Limited | Speech bandwidth extension method and apparatus |
JP3721582B2 (en) | 1993-06-30 | 2005-11-30 | ソニー株式会社 | Signal encoding apparatus and method, and signal decoding apparatus and method |
AU7960994A (en) | 1993-10-08 | 1995-05-04 | Comsat Corporation | Improved low bit rate vocoders and methods of operation therefor |
US5684920A (en) | 1994-03-17 | 1997-11-04 | Nippon Telegraph And Telephone | Acoustic signal transform coding method and decoding method having a high efficiency envelope flattening method therein |
US5487087A (en) * | 1994-05-17 | 1996-01-23 | Texas Instruments Incorporated | Signal quantizer with reduced output fluctuation |
US5797118A (en) | 1994-08-09 | 1998-08-18 | Yamaha Corporation | Learning vector quantization and a temporary memory such that the codebook contents are renewed when a first speaker returns |
JP2770137B2 (en) | 1994-09-22 | 1998-06-25 | 日本プレシジョン・サーキッツ株式会社 | Waveform data compression device |
US5699477A (en) * | 1994-11-09 | 1997-12-16 | Texas Instruments Incorporated | Mixed excitation linear prediction with fractional pitch |
FI97182C (en) | 1994-12-05 | 1996-10-25 | Nokia Telecommunications Oy | Procedure for replacing received bad speech frames in a digital receiver and receiver for a digital telecommunication system |
JP3365113B2 (en) * | 1994-12-22 | 2003-01-08 | ソニー株式会社 | Audio level control device |
JP2798003B2 (en) | 1995-05-09 | 1998-09-17 | 松下電器産業株式会社 | Voice band expansion device and voice band expansion method |
JP2956548B2 (en) | 1995-10-05 | 1999-10-04 | 松下電器産業株式会社 | Voice band expansion device |
JP3189614B2 (en) | 1995-03-13 | 2001-07-16 | 松下電器産業株式会社 | Voice band expansion device |
DE69619284T3 (en) | 1995-03-13 | 2006-04-27 | Matsushita Electric Industrial Co., Ltd., Kadoma | Device for expanding the voice bandwidth |
US6263307B1 (en) * | 1995-04-19 | 2001-07-17 | Texas Instruments Incorporated | Adaptive weiner filtering using line spectral frequencies |
US5706395A (en) | 1995-04-19 | 1998-01-06 | Texas Instruments Incorporated | Adaptive weiner filtering using a dynamic suppression factor |
JP3334419B2 (en) | 1995-04-20 | 2002-10-15 | ソニー株式会社 | Noise reduction method and noise reduction device |
US5699485A (en) | 1995-06-07 | 1997-12-16 | Lucent Technologies Inc. | Pitch delay modification during frame erasures |
US5704003A (en) | 1995-09-19 | 1997-12-30 | Lucent Technologies Inc. | RCELP coder |
US6097824A (en) | 1997-06-06 | 2000-08-01 | Audiologic, Incorporated | Continuous frequency dynamic range audio compressor |
EP0768569B1 (en) * | 1995-10-16 | 2003-04-02 | Agfa-Gevaert | New class of yellow dyes for use in photographic materials |
JP3707116B2 (en) | 1995-10-26 | 2005-10-19 | ソニー株式会社 | Speech decoding method and apparatus |
US5737716A (en) | 1995-12-26 | 1998-04-07 | Motorola | Method and apparatus for encoding speech using neural network technology for speech classification |
JP3073919B2 (en) * | 1995-12-30 | 2000-08-07 | 松下電器産業株式会社 | Synchronizer |
US5689615A (en) * | 1996-01-22 | 1997-11-18 | Rockwell International Corporation | Usage of voice activity detection for efficient coding of speech |
TW307960B (en) * | 1996-02-15 | 1997-06-11 | Philips Electronics Nv | Reduced complexity signal transmission system |
TW416044B (en) | 1996-06-19 | 2000-12-21 | Texas Instruments Inc | Adaptive filter and filtering method for low bit rate coding |
JP3246715B2 (en) * | 1996-07-01 | 2002-01-15 | 松下電器産業株式会社 | Audio signal compression method and audio signal compression device |
DE69721595T2 (en) | 1996-11-07 | 2003-11-27 | Matsushita Electric Ind Co Ltd | Method of generating a vector quantization code book |
US6009395A (en) | 1997-01-02 | 1999-12-28 | Texas Instruments Incorporated | Synthesizer and method using scaled excitation signal |
US6202046B1 (en) | 1997-01-23 | 2001-03-13 | Kabushiki Kaisha Toshiba | Background noise/speech classification method |
US5890126A (en) * | 1997-03-10 | 1999-03-30 | Euphonics, Incorporated | Audio data decompression and interpolation apparatus and method |
US6041297A (en) | 1997-03-10 | 2000-03-21 | At&T Corp | Vocoder for coding speech by using a correlation between spectral magnitudes and candidate excitations |
EP0878790A1 (en) | 1997-05-15 | 1998-11-18 | Hewlett-Packard Company | Voice coding system and method |
SE512719C2 (en) | 1997-06-10 | 2000-05-02 | Lars Gustaf Liljeryd | A method and apparatus for reducing data flow based on harmonic bandwidth expansion |
US6889185B1 (en) | 1997-08-28 | 2005-05-03 | Texas Instruments Incorporated | Quantization of linear prediction coefficients using perceptual weighting |
US6122384A (en) * | 1997-09-02 | 2000-09-19 | Qualcomm Inc. | Noise suppression system and method |
US6029125A (en) | 1997-09-02 | 2000-02-22 | Telefonaktiebolaget L M Ericsson, (Publ) | Reducing sparseness in coded speech signals |
US6231516B1 (en) * | 1997-10-14 | 2001-05-15 | Vacusense, Inc. | Endoluminal implant with therapeutic and diagnostic capability |
JPH11205166A (en) | 1998-01-19 | 1999-07-30 | Mitsubishi Electric Corp | Noise detector |
US6301556B1 (en) * | 1998-03-04 | 2001-10-09 | Telefonaktiebolaget L M. Ericsson (Publ) | Reducing sparseness in coded speech signals |
US6385573B1 (en) * | 1998-08-24 | 2002-05-07 | Conexant Systems, Inc. | Adaptive tilt compensation for synthesized speech residual |
US6449590B1 (en) | 1998-08-24 | 2002-09-10 | Conexant Systems, Inc. | Speech encoder using warping in long term preprocessing |
JP4170458B2 (en) | 1998-08-27 | 2008-10-22 | ローランド株式会社 | Time-axis compression / expansion device for waveform signals |
US6353808B1 (en) | 1998-10-22 | 2002-03-05 | Sony Corporation | Apparatus and method for encoding a signal as well as apparatus and method for decoding a signal |
KR20000047944A (en) * | 1998-12-11 | 2000-07-25 | 이데이 노부유끼 | Receiving apparatus and method, and communicating apparatus and method |
JP4354561B2 (en) | 1999-01-08 | 2009-10-28 | パナソニック株式会社 | Audio signal encoding apparatus and decoding apparatus |
US6223151B1 (en) | 1999-02-10 | 2001-04-24 | Telefon Aktie Bolaget Lm Ericsson | Method and apparatus for pre-processing speech signals prior to coding by transform-based speech coders |
US6829360B1 (en) * | 1999-05-14 | 2004-12-07 | Matsushita Electric Industrial Co., Ltd. | Method and apparatus for expanding band of audio signal |
US6604070B1 (en) | 1999-09-22 | 2003-08-05 | Conexant Systems, Inc. | System of encoding and decoding speech signals |
JP4792613B2 (en) | 1999-09-29 | 2011-10-12 | ソニー株式会社 | Information processing apparatus and method, and recording medium |
US6556950B1 (en) | 1999-09-30 | 2003-04-29 | Rockwell Automation Technologies, Inc. | Diagnostic method and apparatus for use with enterprise control |
US6715125B1 (en) | 1999-10-18 | 2004-03-30 | Agere Systems Inc. | Source coding and transmission with time diversity |
WO2001037263A1 (en) | 1999-11-16 | 2001-05-25 | Koninklijke Philips Electronics N.V. | Wideband audio transmission system |
CA2290037A1 (en) | 1999-11-18 | 2001-05-18 | Voiceage Corporation | Gain-smoothing amplifier device and method in codecs for wideband speech and audio signals |
US7260523B2 (en) | 1999-12-21 | 2007-08-21 | Texas Instruments Incorporated | Sub-band speech coding system |
AU2547201A (en) | 2000-01-11 | 2001-07-24 | Matsushita Electric Industrial Co., Ltd. | Multi-mode voice encoding device and decoding device |
US6757395B1 (en) | 2000-01-12 | 2004-06-29 | Sonic Innovations, Inc. | Noise reduction apparatus and method |
US6704711B2 (en) | 2000-01-28 | 2004-03-09 | Telefonaktiebolaget Lm Ericsson (Publ) | System and method for modifying speech signals |
US6732070B1 (en) * | 2000-02-16 | 2004-05-04 | Nokia Mobile Phones, Ltd. | Wideband speech codec using a higher sampling rate in analysis and synthesis filtering than in excitation searching |
JP3681105B2 (en) | 2000-02-24 | 2005-08-10 | アルパイン株式会社 | Data processing method |
FI119576B (en) * | 2000-03-07 | 2008-12-31 | Nokia Corp | Speech processing device and procedure for speech processing, as well as a digital radio telephone |
US6523003B1 (en) * | 2000-03-28 | 2003-02-18 | Tellabs Operations, Inc. | Spectrally interdependent gain adjustment techniques |
US6757654B1 (en) | 2000-05-11 | 2004-06-29 | Telefonaktiebolaget Lm Ericsson | Forward error correction in speech coding |
US7330814B2 (en) | 2000-05-22 | 2008-02-12 | Texas Instruments Incorporated | Wideband speech coding with modulated noise highband excitation system and method |
ATE265732T1 (en) | 2000-05-22 | 2004-05-15 | Texas Instruments Inc | DEVICE AND METHOD FOR BROADBAND CODING OF VOICE SIGNALS |
US7136810B2 (en) * | 2000-05-22 | 2006-11-14 | Texas Instruments Incorporated | Wideband speech coding system and method |
JP2002055699A (en) * | 2000-08-10 | 2002-02-20 | Mitsubishi Electric Corp | Device and method for encoding voice |
AU2001282098A1 (en) | 2000-08-25 | 2002-03-04 | Koninklijke Philips Electronics N.V. | Method and apparatus for reducing the word length of a digital input signal and method and apparatus for recovering the digital input signal |
US6515889B1 (en) * | 2000-08-31 | 2003-02-04 | Micron Technology, Inc. | Junction-isolated depletion mode ferroelectric memory |
US7386444B2 (en) * | 2000-09-22 | 2008-06-10 | Texas Instruments Incorporated | Hybrid speech coding and system |
US6947888B1 (en) | 2000-10-17 | 2005-09-20 | Qualcomm Incorporated | Method and apparatus for high performance low bit-rate coding of unvoiced speech |
JP2002202799A (en) | 2000-10-30 | 2002-07-19 | Fujitsu Ltd | Voice code conversion apparatus |
JP3558031B2 (en) | 2000-11-06 | 2004-08-25 | 日本電気株式会社 | Speech decoding device |
KR100865860B1 (en) * | 2000-11-09 | 2008-10-29 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | Wideband extension of telephone speech for higher perceptual quality |
SE0004163D0 (en) * | 2000-11-14 | 2000-11-14 | Coding Technologies Sweden Ab | Enhancing perceptual performance or high frequency reconstruction coding methods by adaptive filtering |
SE0004187D0 (en) * | 2000-11-15 | 2000-11-15 | Coding Technologies Sweden Ab | Enhancing the performance of coding systems that use high frequency reconstruction methods |
AU2002218501A1 (en) | 2000-11-30 | 2002-06-11 | Matsushita Electric Industrial Co., Ltd. | Vector quantizing device for lpc parameters |
GB0031461D0 (en) | 2000-12-22 | 2001-02-07 | Thales Defence Ltd | Communication sets |
US20040204935A1 (en) | 2001-02-21 | 2004-10-14 | Krishnasamy Anandakumar | Adaptive voice playout in VOP |
JP2002268698A (en) | 2001-03-08 | 2002-09-20 | Nec Corp | Voice recognition device, device and method for standard pattern generation, and program |
US20030028386A1 (en) | 2001-04-02 | 2003-02-06 | Zinser Richard L. | Compressed domain universal transcoder |
SE522553C2 (en) | 2001-04-23 | 2004-02-17 | Ericsson Telefon Ab L M | Bandwidth extension of acoustic signals |
DE50104998D1 (en) * | 2001-05-11 | 2005-02-03 | Siemens Ag | METHOD FOR EXPANDING THE BANDWIDTH OF A NARROW-FILTERED LANGUAGE SIGNAL, ESPECIALLY A LANGUAGE SIGNAL SENT BY A TELECOMMUNICATIONS DEVICE |
CN1235192C (en) | 2001-06-28 | 2006-01-04 | 皇家菲利浦电子有限公司 | Wideband signal transmission system |
US6879955B2 (en) * | 2001-06-29 | 2005-04-12 | Microsoft Corporation | Signal modification based on continuous time warping for low bit rate CELP coding |
JP2003036097A (en) | 2001-07-25 | 2003-02-07 | Sony Corp | Device and method for detecting and retrieving information |
TW525147B (en) | 2001-09-28 | 2003-03-21 | Inventec Besta Co Ltd | Method of obtaining and decoding basic cycle of voice |
US6988066B2 (en) | 2001-10-04 | 2006-01-17 | At&T Corp. | Method of bandwidth extension for narrow-band speech |
US6895375B2 (en) | 2001-10-04 | 2005-05-17 | At&T Corp. | System for bandwidth extension of Narrow-band speech |
TW526468B (en) | 2001-10-19 | 2003-04-01 | Chunghwa Telecom Co Ltd | System and method for eliminating background noise of voice signal |
JP4245288B2 (en) * | 2001-11-13 | 2009-03-25 | パナソニック株式会社 | Speech coding apparatus and speech decoding apparatus |
JP2005509928A (en) * | 2001-11-23 | 2005-04-14 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Audio signal bandwidth expansion |
CA2365203A1 (en) | 2001-12-14 | 2003-06-14 | Voiceage Corporation | A signal modification method for efficient coding of speech signals |
US6751587B2 (en) | 2002-01-04 | 2004-06-15 | Broadcom Corporation | Efficient excitation quantization in noise feedback coding with general noise shaping |
JP4290917B2 (en) * | 2002-02-08 | 2009-07-08 | 株式会社エヌ・ティ・ティ・ドコモ | Decoding device, encoding device, decoding method, and encoding method |
JP3826813B2 (en) | 2002-02-18 | 2006-09-27 | ソニー株式会社 | Digital signal processing apparatus and digital signal processing method |
EP1543307B1 (en) | 2002-09-19 | 2006-02-22 | Matsushita Electric Industrial Co., Ltd. | Audio decoding apparatus and method |
JP3756864B2 (en) | 2002-09-30 | 2006-03-15 | 株式会社東芝 | Speech synthesis method and apparatus and speech synthesis program |
KR100841096B1 (en) * | 2002-10-14 | 2008-06-25 | 리얼네트웍스아시아퍼시픽 주식회사 | Preprocessing of digital audio data for mobile speech codecs |
US20040098255A1 (en) | 2002-11-14 | 2004-05-20 | France Telecom | Generalized analysis-by-synthesis speech coding method, and coder implementing such method |
US7242763B2 (en) | 2002-11-26 | 2007-07-10 | Lucent Technologies Inc. | Systems and methods for far-end noise reduction and near-end noise compensation in a mixed time-frequency domain compander to improve signal quality in communications systems |
CA2415105A1 (en) * | 2002-12-24 | 2004-06-24 | Voiceage Corporation | A method and device for robust predictive vector quantization of linear prediction parameters in variable bit rate speech coding |
KR100480341B1 (en) | 2003-03-13 | 2005-03-31 | 한국전자통신연구원 | Apparatus for coding wide-band low bit rate speech signal |
EP1618557B1 (en) | 2003-05-01 | 2007-07-25 | Nokia Corporation | Method and device for gain quantization in variable bit rate wideband speech coding |
WO2005004113A1 (en) * | 2003-06-30 | 2005-01-13 | Fujitsu Limited | Audio encoding device |
US20050004793A1 (en) | 2003-07-03 | 2005-01-06 | Pasi Ojala | Signal adaptation for higher band coding in a codec utilizing band split coding |
FI118550B (en) | 2003-07-14 | 2007-12-14 | Nokia Corp | Enhanced excitation for higher frequency band coding in a codec utilizing band splitting based coding methods |
US7428490B2 (en) * | 2003-09-30 | 2008-09-23 | Intel Corporation | Method for spectral subtraction in speech enhancement |
US7689579B2 (en) * | 2003-12-03 | 2010-03-30 | Siemens Aktiengesellschaft | Tag modeling within a decision, support, and reporting environment |
KR100587953B1 (en) | 2003-12-26 | 2006-06-08 | 한국전자통신연구원 | Packet loss concealment apparatus for high-band in split-band wideband speech codec, and system for decoding bit-stream using the same |
CA2454296A1 (en) | 2003-12-29 | 2005-06-29 | Nokia Corporation | Method and device for speech enhancement in the presence of background noise |
JP4259401B2 (en) | 2004-06-02 | 2009-04-30 | カシオ計算機株式会社 | Speech processing apparatus and speech coding method |
US8000967B2 (en) | 2005-03-09 | 2011-08-16 | Telefonaktiebolaget Lm Ericsson (Publ) | Low-complexity code excited linear prediction encoding |
US8155965B2 (en) | 2005-03-11 | 2012-04-10 | Qualcomm Incorporated | Time warping frames inside the vocoder by modifying the residual |
CN101185124B (en) | 2005-04-01 | 2012-01-11 | 高通股份有限公司 | Method and apparatus for dividing frequency band coding of voice signal |
RU2376657C2 (en) | 2005-04-01 | 2009-12-20 | Квэлкомм Инкорпорейтед | Systems, methods and apparatus for highband time warping |
TWI317933B (en) | 2005-04-22 | 2009-12-01 | Qualcomm Inc | Methods, data storage medium,apparatus of signal processing,and cellular telephone including the same |
-
2006
- 2006-04-03 RU RU2007140365/09A patent/RU2376657C2/en active
- 2006-04-03 BR BRPI0607690A patent/BRPI0607690A8/en not_active Application Discontinuation
- 2006-04-03 BR BRPI0609530-5A patent/BRPI0609530B1/en active IP Right Grant
- 2006-04-03 US US11/397,870 patent/US8260611B2/en active Active
- 2006-04-03 TW TW095111814A patent/TWI330828B/en active
- 2006-04-03 AU AU2006232358A patent/AU2006232358B2/en not_active Expired - Fee Related
- 2006-04-03 AU AU2006232364A patent/AU2006232364B2/en active Active
- 2006-04-03 AU AU2006232363A patent/AU2006232363B2/en active Active
- 2006-04-03 RU RU2007140383/09A patent/RU2402826C2/en active
- 2006-04-03 TW TW095111804A patent/TWI321314B/en active
- 2006-04-03 JP JP2008504481A patent/JP4955649B2/en active Active
- 2006-04-03 KR KR1020077025447A patent/KR101019940B1/en active IP Right Grant
- 2006-04-03 PT PT67403584T patent/PT1864282T/en unknown
- 2006-04-03 NZ NZ562182A patent/NZ562182A/en not_active IP Right Cessation
- 2006-04-03 WO PCT/US2006/012234 patent/WO2006130221A1/en active Application Filing
- 2006-04-03 WO PCT/US2006/012235 patent/WO2006107840A1/en active Application Filing
- 2006-04-03 SI SI200632188T patent/SI1864282T1/en unknown
- 2006-04-03 US US11/397,794 patent/US8484036B2/en active Active
- 2006-04-03 WO PCT/US2006/012228 patent/WO2006107834A1/en active Application Filing
- 2006-04-03 JP JP2008504478A patent/JP5129117B2/en active Active
- 2006-04-03 JP JP2008504479A patent/JP5203930B2/en active Active
- 2006-04-03 US US11/397,370 patent/US8078474B2/en active Active
- 2006-04-03 US US11/397,872 patent/US8069040B2/en active Active
- 2006-04-03 CA CA2602804A patent/CA2602804C/en active Active
- 2006-04-03 MX MX2007012189A patent/MX2007012189A/en active IP Right Grant
- 2006-04-03 JP JP2008504474A patent/JP5203929B2/en active Active
- 2006-04-03 CN CN201110326747.2A patent/CN102411935B/en active Active
- 2006-04-03 TW TW095111797A patent/TWI316225B/en active
- 2006-04-03 WO PCT/US2006/012227 patent/WO2006107833A1/en active Application Filing
- 2006-04-03 AU AU2006252957A patent/AU2006252957B2/en active Active
- 2006-04-03 NZ NZ562190A patent/NZ562190A/en not_active IP Right Cessation
- 2006-04-03 WO PCT/US2006/012233 patent/WO2006107839A2/en active Application Filing
- 2006-04-03 JP JP2008504477A patent/JP5129116B2/en active Active
- 2006-04-03 KR KR1020077025400A patent/KR100956877B1/en active IP Right Grant
- 2006-04-03 BR BRPI0607646-7A patent/BRPI0607646B1/en active IP Right Grant
- 2006-04-03 ES ES06784345T patent/ES2391292T3/en active Active
- 2006-04-03 WO PCT/US2006/012232 patent/WO2006107838A1/en active Application Filing
- 2006-04-03 PL PL06740358T patent/PL1864282T3/en unknown
- 2006-04-03 JP JP2008504480A patent/JP5129118B2/en active Active
- 2006-04-03 KR KR1020077025255A patent/KR100956624B1/en active IP Right Grant
- 2006-04-03 DE DE602006018884T patent/DE602006018884D1/en active Active
- 2006-04-03 EP EP06740356A patent/EP1864283B1/en active Active
- 2006-04-03 RU RU2009131435/08A patent/RU2491659C2/en active
- 2006-04-03 TW TW095111851A patent/TWI319565B/en active
- 2006-04-03 RU RU2007140429/09A patent/RU2387025C2/en active
- 2006-04-03 AT AT06740354T patent/ATE459958T1/en not_active IP Right Cessation
- 2006-04-03 TW TW095111794A patent/TWI320923B/en active
- 2006-04-03 PL PL06784345T patent/PL1864101T3/en unknown
- 2006-04-03 NZ NZ562188A patent/NZ562188A/en not_active IP Right Cessation
- 2006-04-03 AT AT06740357T patent/ATE492016T1/en not_active IP Right Cessation
- 2006-04-03 TW TW095111819A patent/TWI321315B/en active
- 2006-04-03 JP JP2008504475A patent/JP5129115B2/en active Active
- 2006-04-03 CA CA2603229A patent/CA2603229C/en active Active
- 2006-04-03 BR BRPI0607691A patent/BRPI0607691B1/en active IP Right Grant
- 2006-04-03 EP EP06784345A patent/EP1864101B1/en active Active
- 2006-04-03 NZ NZ562186A patent/NZ562186A/en not_active IP Right Cessation
- 2006-04-03 BR BRPI0608269A patent/BRPI0608269B8/en active IP Right Grant
- 2006-04-03 MX MX2007012183A patent/MX2007012183A/en active IP Right Grant
- 2006-04-03 CA CA2602806A patent/CA2602806C/en active Active
- 2006-04-03 MX MX2007012182A patent/MX2007012182A/en active IP Right Grant
- 2006-04-03 BR BRPI0608306-4A patent/BRPI0608306A2/en not_active Application Discontinuation
- 2006-04-03 SG SG201004741-3A patent/SG163555A1/en unknown
- 2006-04-03 PT PT06784345T patent/PT1864101E/en unknown
- 2006-04-03 EP EP06740354A patent/EP1866914B1/en active Active
- 2006-04-03 MX MX2007012191A patent/MX2007012191A/en active IP Right Grant
- 2006-04-03 ES ES06740358.4T patent/ES2636443T3/en active Active
- 2006-04-03 ES ES06740354T patent/ES2340608T3/en active Active
- 2006-04-03 MX MX2007012184A patent/MX2007012184A/en active IP Right Grant
- 2006-04-03 KR KR1020077025422A patent/KR100956523B1/en active IP Right Grant
- 2006-04-03 MX MX2007012181A patent/MX2007012181A/en active IP Right Grant
- 2006-04-03 US US11/397,505 patent/US8332228B2/en active Active
- 2006-04-03 EP EP06740358.4A patent/EP1864282B1/en active Active
- 2006-04-03 NZ NZ562183A patent/NZ562183A/en unknown
- 2006-04-03 PL PL06740357T patent/PL1866915T3/en unknown
- 2006-04-03 CA CA2603219A patent/CA2603219C/en active Active
- 2006-04-03 BR BRPI0608270-0A patent/BRPI0608270A2/en not_active Application Discontinuation
- 2006-04-03 DE DE602006017050T patent/DE602006017050D1/en active Active
- 2006-04-03 CA CA2603255A patent/CA2603255C/en active Active
- 2006-04-03 AU AU2006232361A patent/AU2006232361B2/en active Active
- 2006-04-03 WO PCT/US2006/012230 patent/WO2006107836A1/en active Application Filing
- 2006-04-03 EP EP06740352A patent/EP1864281A1/en not_active Withdrawn
- 2006-04-03 BR BRPI0608305-6A patent/BRPI0608305B1/en active IP Right Grant
- 2006-04-03 AT AT06740351T patent/ATE485582T1/en not_active IP Right Cessation
- 2006-04-03 EP EP06740351A patent/EP1869670B1/en active Active
- 2006-04-03 EP EP06740355A patent/EP1869673B1/en active Active
- 2006-04-03 DK DK06784345.8T patent/DK1864101T3/en active
- 2006-04-03 SG SG201002303-4A patent/SG161224A1/en unknown
- 2006-04-03 RU RU2007140406/09A patent/RU2390856C2/en active
- 2006-04-03 JP JP2008504482A patent/JP5161069B2/en active Active
- 2006-04-03 DE DE602006012637T patent/DE602006012637D1/en active Active
- 2006-04-03 US US11/397,432 patent/US8364494B2/en active Active
- 2006-04-03 CA CA2603187A patent/CA2603187C/en active Active
- 2006-04-03 MX MX2007012187A patent/MX2007012187A/en active IP Right Grant
- 2006-04-03 TW TW095111800A patent/TWI321777B/en active
- 2006-04-03 RU RU2007140394/09A patent/RU2413191C2/en active
- 2006-04-03 MX MX2007012185A patent/MX2007012185A/en active IP Right Grant
- 2006-04-03 KR KR1020077025421A patent/KR100956524B1/en active IP Right Grant
- 2006-04-03 AU AU2006232357A patent/AU2006232357C1/en active Active
- 2006-04-03 SG SG201004744-7A patent/SG163556A1/en unknown
- 2006-04-03 RU RU2007140381/09A patent/RU2386179C2/en active
- 2006-04-03 CA CA2603231A patent/CA2603231C/en active Active
- 2006-04-03 EP EP06740357A patent/EP1866915B1/en active Active
- 2006-04-03 AU AU2006232360A patent/AU2006232360B2/en active Active
- 2006-04-03 KR KR1020077025290A patent/KR100956876B1/en active IP Right Grant
- 2006-04-03 PL PL06740355T patent/PL1869673T3/en unknown
- 2006-04-03 AT AT06740355T patent/ATE482449T1/en not_active IP Right Cessation
- 2006-04-03 KR KR1020077025293A patent/KR100982638B1/en active IP Right Grant
- 2006-04-03 US US11/397,433 patent/US8244526B2/en active Active
- 2006-04-03 DE DE602006017673T patent/DE602006017673D1/en active Active
- 2006-04-03 RU RU2007140382/09A patent/RU2381572C2/en active
- 2006-04-03 WO PCT/US2006/012231 patent/WO2006107837A1/en active Application Filing
- 2006-04-03 AU AU2006232362A patent/AU2006232362B2/en active Active
- 2006-04-03 TW TW095111852A patent/TWI324335B/en active
- 2006-04-03 CA CA2603246A patent/CA2603246C/en active Active
- 2006-04-03 NZ NZ562185A patent/NZ562185A/en not_active IP Right Cessation
- 2006-04-03 SG SG201002300-0A patent/SG161223A1/en unknown
- 2006-04-03 US US11/397,871 patent/US8140324B2/en active Active
- 2006-04-03 KR KR1020077025432A patent/KR100956525B1/en active IP Right Grant
- 2006-04-03 DK DK06740358.4T patent/DK1864282T3/en active
- 2006-04-03 RU RU2007140426/09A patent/RU2402827C2/en active
-
2007
- 2007-10-07 IL IL186439A patent/IL186439A0/en unknown
- 2007-10-07 IL IL186405A patent/IL186405A/en active IP Right Grant
- 2007-10-07 IL IL186441A patent/IL186441A0/en active IP Right Grant
- 2007-10-07 IL IL186438A patent/IL186438A/en active IP Right Grant
- 2007-10-07 IL IL186442A patent/IL186442A/en active IP Right Grant
- 2007-10-07 IL IL186404A patent/IL186404A/en active IP Right Grant
- 2007-10-07 IL IL186436A patent/IL186436A0/en active IP Right Grant
- 2007-10-07 IL IL186443A patent/IL186443A/en active IP Right Grant
- 2007-10-31 NO NO20075503A patent/NO20075503L/en not_active Application Discontinuation
- 2007-10-31 NO NO20075513A patent/NO340428B1/en unknown
- 2007-10-31 NO NO20075512A patent/NO20075512L/en not_active Application Discontinuation
- 2007-10-31 NO NO20075510A patent/NO20075510L/en not_active Application Discontinuation
- 2007-10-31 NO NO20075511A patent/NO20075511L/en not_active Application Discontinuation
- 2007-10-31 NO NO20075514A patent/NO340434B1/en unknown
- 2007-10-31 NO NO20075515A patent/NO340566B1/en unknown
-
2008
- 2008-08-28 HK HK08109568.5A patent/HK1113848A1/en unknown
- 2008-09-19 HK HK08110384.5A patent/HK1115023A1/en unknown
- 2008-09-22 HK HK08110465.7A patent/HK1114901A1/en unknown
- 2008-09-24 HK HK12110024.5A patent/HK1169509A1/en unknown
- 2008-09-24 HK HK08110589.8A patent/HK1115024A1/en unknown
Non-Patent Citations (3)
Title |
---|
ANONYMOUS: "NOISE SHAPING", 5 December 2004 (2004-12-05), XP002387163, Retrieved from the Internet <URL:http://en.wikipedia.org/w/index.php?title=Noise_shaping&oldid=8138470> [retrieved on 20060626] * |
DATTORO J ET AL: "Error spectrum Shaping and Vector Quantization", October 1997 (1997-10-01), STANFORD UNIVERSITY, XP002307027, Retrieved from the Internet <URL:www.stanford.edu/~dattorro/proj392c.pdf> [retrieved on 20060623] * |
HSI-WEN NEIN ET AL: "Incorporating Error Shaping Technique into LSF Vector Quantization", IEEE TRANSACTIONS ON SPEECH AND AUDIO PROCESSING, IEEE SERVICE CENTER, NEW YORK, NY, US, vol. 9, no. 2, February 2001 (2001-02-01), XP011054076, ISSN: 1063-6676 * |
Cited By (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010500631A (en) * | 2006-08-15 | 2010-01-07 | ドルビー・ラボラトリーズ・ライセンシング・コーポレーション | Free shaping of temporal noise envelope without side information |
US8706507B2 (en) | 2006-08-15 | 2014-04-22 | Dolby Laboratories Licensing Corporation | Arbitrary shaping of temporal noise envelope without side-information utilizing unchanged quantization |
US8452605B2 (en) | 2006-10-25 | 2013-05-28 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. | Apparatus and method for generating audio subband values and apparatus and method for generating time-domain audio samples |
US8775193B2 (en) | 2006-10-25 | 2014-07-08 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. | Apparatus and method for generating audio subband values and apparatus and method for generating time-domain audio samples |
JP2009530675A (en) * | 2006-10-25 | 2009-08-27 | フラウンホーファー−ゲゼルシャフト・ツール・フェルデルング・デル・アンゲヴァンテン・フォルシュング・アインゲトラーゲネル・フェライン | Apparatus and method for generating audio subband values, and apparatus and method for generating time domain audio samples |
US8699727B2 (en) | 2010-01-15 | 2014-04-15 | Apple Inc. | Visually-assisted mixing of audio using a spectral analyzer |
US9530396B2 (en) | 2010-01-15 | 2016-12-27 | Apple Inc. | Visually-assisted mixing of audio using a spectral analyzer |
US9324332B2 (en) | 2010-04-13 | 2016-04-26 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewan | Method and encoder and decoder for sample-accurate representation of an audio signal |
RU2546602C2 (en) * | 2010-04-13 | 2015-04-10 | Фраунхофер-Гезелльшафт Цур Фердерунг Дер Ангевандтен Форшунг Е.Ф. | Method and encoder and decoder for reproduction without audio signal interval |
WO2012001187A1 (en) * | 2010-06-29 | 2012-01-05 | Universidad De Malaga | Low-consumption sound recognition system |
ES2372202A1 (en) * | 2010-06-29 | 2012-01-17 | Universidad De Málaga | Low-consumption sound recognition system |
US9502046B2 (en) | 2012-09-21 | 2016-11-22 | Dolby Laboratories Licensing Corporation | Coding of a sound field signal |
US9495970B2 (en) | 2012-09-21 | 2016-11-15 | Dolby Laboratories Licensing Corporation | Audio coding with gain profile extraction and transmission for speech enhancement at the decoder |
US9858936B2 (en) | 2012-09-21 | 2018-01-02 | Dolby Laboratories Licensing Corporation | Methods and systems for selecting layers of encoded audio signals for teleconferencing |
US9460729B2 (en) | 2012-09-21 | 2016-10-04 | Dolby Laboratories Licensing Corporation | Layered approach to spatial audio coding |
CN105264599A (en) * | 2013-01-29 | 2016-01-20 | 弗劳恩霍夫应用研究促进协会 | Audio encoder, audio decoder, method for providing encoded audio information and decoded audio information, computer program and encoded representation using a signal-adaptive bandwidth extension |
US10096322B2 (en) | 2013-06-21 | 2018-10-09 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. | Audio decoder having a bandwidth extension module with an energy adjusting module |
EP3594944A1 (en) * | 2013-07-04 | 2020-01-15 | Huawei Technologies Co., Ltd. | Frequency envelope vector quantization method and apparatus |
EP2983170A4 (en) * | 2013-07-04 | 2016-04-13 | Huawei Tech Co Ltd | Frequency domain envelope vector quantization method and apparatus |
US9805732B2 (en) | 2013-07-04 | 2017-10-31 | Huawei Technologies Co., Ltd. | Frequency envelope vector quantization method and apparatus |
US10032460B2 (en) | 2013-07-04 | 2018-07-24 | Huawei Technologies Co., Ltd. | Frequency envelope vector quantization method and apparatus |
EP4231288A1 (en) * | 2013-07-04 | 2023-08-23 | Crystal Clear Codec, LLC | Frequency envelope vector quantization method and apparatus |
US10354663B2 (en) | 2014-07-28 | 2019-07-16 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Apparatus and method for generating an enhanced signal using independent noise-filling |
US10885924B2 (en) | 2014-07-28 | 2021-01-05 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Apparatus and method for generating an enhanced signal using independent noise-filling |
US11264042B2 (en) | 2014-07-28 | 2022-03-01 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Apparatus and method for generating an enhanced signal using independent noise-filling information which comprises energy information and is included in an input signal |
US11705145B2 (en) | 2014-07-28 | 2023-07-18 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Apparatus and method for generating an enhanced signal using independent noise-filling |
US10529348B2 (en) | 2014-07-28 | 2020-01-07 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. | Apparatus and method for generating an enhanced signal using independent noise-filling identified by an identification vector |
US11908484B2 (en) | 2014-07-28 | 2024-02-20 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Apparatus and method for generating an enhanced signal using independent noise-filling at random values and scaling thereupon |
Also Published As
Similar Documents
Publication | Publication Date | Title |
---|---|---|
AU2006232357B2 (en) | Method and apparatus for vector quantizing of a spectral envelope representation | |
US9454974B2 (en) | Systems, methods, and apparatus for gain factor limiting | |
EP2577659B1 (en) | Systems, methods, apparatus, and computer program products for wideband speech coding | |
US8892448B2 (en) | Systems, methods, and apparatus for gain factor smoothing | |
JP5437067B2 (en) | System and method for including an identifier in a packet associated with a voice signal |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 200680018140.5 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
ENP | Entry into the national phase |
Ref document number: 2603219 Country of ref document: CA Ref document number: 2008504474 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: MX/a/2007/012185 Country of ref document: MX Ref document number: 12007502151 Country of ref document: PH |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 562185 Country of ref document: NZ |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2006232357 Country of ref document: AU |
|
WWE | Wipo information: entry into national phase |
Ref document number: 186438 Country of ref document: IL |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1695/MUMNP/2007 Country of ref document: IN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2006740351 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1200702264 Country of ref document: VN |
|
ENP | Entry into the national phase |
Ref document number: 2006232357 Country of ref document: AU Date of ref document: 20060403 Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2007140429 Country of ref document: RU Ref document number: 1020077025400 Country of ref document: KR |
|
ENP | Entry into the national phase |
Ref document number: PI0608269 Country of ref document: BR Kind code of ref document: A2 |